Rankings are by number of overnights, then (in case of ties) by number of years, then (in case of ties) alphabetically. "Years" means the number of different calendar years in which I have "set foot" in the indicated state or country (including being inside a vehicle on the ground).
Note: Where my records have been imperfect, or lost, I have estimated to the best of my ability.
BY COUNTRY
UNITED STATES
Years: 69 First: 1956 Last: 2024 Overnights: 24,500+ (most: 366 in 1960, 1964, 1968, 1972, 1976, 1980, 1984, 1988, 1992, 2000, 2004, 2012, 2020)
CANADA
Years: 8 First: 1977 Last: 2013 Overnights: 15 (most: 5 in 1996)
ITALY
Years: 1 First: 2016 Last: 2016 Overnights: 6 (all in 2016)
MEXICO
Years: 5 First: 1980 Last: 1990 Overnights: 3 (all in 1990)
GERMANY
Years: 2 (including 1 airport only) First: 2016 Last: 2021 Overnights: 3 (all in 2021)
AUSTRIA
Years: 1 First: 2021 Last: 2021 Overnights: 3 (all in 2021)
HUNGARY
Years: 1 First: 2021 Last: 2021 Overnights: 1 (2021)
SLOVAKIA
Years: 1 First: 2021 Last: 2021 Overnights: 0
BY STATE (U.S., Mexico) AND PROVINCE (Canada)
Texas
Years: 69 First: 1956 Last: 2024 Overnights: 22,000+ (most: 366 in 1960, 2000, 2004, 2020) (San Antonio***, Dallas**, Houston**, Garland*, Wichita Falls, Waco, Corpus Christi)
Florida
Years: 10 First: 1981 Last: 2012 Overnights: 700 (most: 283 in 1988) (Jacksonville*)
Massachusetts
Years: 6 First: 1974 Last: 2017 Overnights: 458 (most: 209 in 1975) (Cambridge*)
Virginia
Years: 15 (including 2 airport only) First: 1964 Last: 2021 Overnights: 307 (most: 179 in 1987) (Norfolk*)
New York
Years: 13 (including 2 airport only) First: 1964 Last: 2017 Overnights: 253 (most: 53 in 1977) (Glens Falls*, Lewis)
Tennessee
Years: 13 (including 3 airport only) First: 1972 Last: 2017 Overnights: 81 (most: 38 in 1972, 1973) (Sewanee)
West Virginia
Years: 7 First: 1964 Last: 2017 Overnights: 63 (most: 60 in 1984) (White Sulphur Springs)
California
Years: 5 (including 1 airport only) First: 1982 Last: 2023 Overnights: 51 (most: 35 in 1993) (Carmel)
Iowa
Years: 6 First: 1973 Last: 2019 Overnights: 43 (most: 38 in 1990) (Indianola)
Oklahoma
Years: 17 First: 1963 Last: 2022 Overnights: 42 (most: 14 in 1982)
Colorado
Years: 7 (including 2 airport only) First: 1969 Last: 2022 Overnights: 34 (most: 20 in 1990) (Boulder)
Michigan
Years: 7 (including 1 airport only) First: 1963 Last: 2019 Overnights: 32 (most: 9 in 1988)
Georgia
Years: 12 (including 3 airport only) First: 1972 Last: 2017 Overnights: 28 (most: 16 in 1988) (Savannah)
Pennsylvania
Years: 11 First: 1964 Last: 2017 Overnights: 23 (most: 5 in 1982) (Elkins Park)
Illinois
Years: 10 (including 4 airport only) First: 1963 Last: 2021 Overnights: 19 (most: 6 in 1981, 1983)
North Carolina
Years: 9 First: 1977 Last: 2017 Overnights: 17 (most: 12 in 1991) (Boone)
Missouri
Years: 10 (including 1 airport only) First: 1963 Last: 2019 Overnights: 16 (most: 7 in 1968)
Louisiana
Years: 13 (including 2 airport only) First: 1972 Last: 2017 Overnights: 15 (most: 4 in 1981)
Arizona
Years: 6 First: 1980 Last: 2015 Overnights: 14 (most: 8 in 1980)
Arkansas
Years: 11 First: 1973 Last: 2017 Overnights: 13 (most: 2 in 1974, 1981, 1991, 2003, 2013)
New Mexico
Years: 10 (including 1 airport only) First: 1962 Last: 2022 Overnights: 11 (most: 5 in 1962)
Washington (state)
Years: 2 First: 1995 Last: 2010 Overnights: 11 (most: 9 in 2010)
Kansas
Years: 8 First: 1968 Last: 2019 Overnights: 7 (most: 2 in 1983)
Indiana
Years: 6 (including 1 airport only) First: 1963 Last: 2019 Overnights: 7 (most: 3 in 1983)
Maryland
Years: 10 First: 1964 Last: 2017 Overnights: 6 (most: 3 in 1964)
Utah
Years: 2 First: 1980 Last: 2015 Overnights: 6 (most: 4 in 1980)
Mississippi
Years: 7 First: 1981 Last: 2017 Overnights: 5 (most: 2 in 1981)
Alberta, Canada
Years: 1 First: 1996 Last: 1996 Overnights: 5 (all in 1996)
Kentucky
Years: 6 (including 1 airport only) First: 1981 Last: 2008 Overnights: 4 (1 in 1981, 1983, 1985, 1988)
Ontario, Canada
Years: 4 First: 1988 Last: 2008 Overnights: 4 (2 in 1990, 2008)
Minnesota
Years: 1 First: 2013 Last: 2013 Overnights: 4 (all in 2013)
Ohio
Years: 4 First: 1964 Last: 1989 Overnights: 3 (most: 2 in 1983)
British Columbia, Canada
Years: 2 First: 1996 Last: 2010 Overnights: 3 (all in 2010)
Quebec, Canada
Years: 2 First: 1977 Last: 1989 Overnights: 3 (most: 2 in 1989)
Wisconsin
Years: 2 First: 1983 Last: 2019 Overnights: 3 (most: 2 in 2019)
Idaho
Years: 1 First: 1980 Last: 1980 Overnights: 3 (all in 1980)
Nuevo León, Mexico
Years: 1 First: 1990 Last: 1990 Overnights: 3 (all in 1990)
Oregon
Years: 1 First: 1995 Last: 1995 Overnights: 3 (all in 1995)
Alabama
Years: 7 First: 1981 Last: 2017 Overnights: 2 (1 in 1981, 1999)
South Carolina
Years: 5 First: 1981 Last: 1990 Overnights: 2 (1 in 1981, 1987)
Connecticut
Years: 4 First: 1964 Last: 2017 Overnights: 2 (both in 2017)
New Hampshire
Years: 3 First: 1974 Last: 2001 Overnights: 2 (both in 2001)
Maine
Years: 1 First: 2001 Last: 2001 Overnights: 2 (both in 2001)
Montana
Years: 1 First: 1996 Last: 1996 Overnights: 2 (both in 1996)
New Jersey
Years: 11 (including 1 airport only) First: 1964 Last: 2017 Overnights: 1 (2007)
Delaware
Years: 6 First: 1964 Last: 2017 Overnights: 1 (2007)
Nebraska
Years: 2 First: 1990 Last: 2013 Overnights: 1 (2013)
Nevada
Years: 2 First: 2015 Last: 2023 Overnights: 1 (2023)
North Dakota
Years: 1 First: 2013 Last: 2013 Overnights: 1 (2013)
Wyoming
Years: 1 First: 1996 Last: 1996 Overnights: 1 (1996)
District of Columbia
Years: 5 First: 1964 Last: 2007 Overnights: 0
Vermont
Years: 5 First: 1986 Last: 2001 Overnights: 0
Tamaulipas, Mexico
Years: 3 First: 1981 Last: 1990 Overnights: 0
Chihuahua, Mexico
Years: 2 First: 1980 Last: 1982 Overnights: 0
Coahuila, Mexico
Years: 2 First: 1981 Last: 1982 Overnights: 0
Manitoba, Canada
Years: 1 First: 2013 Last: 2013 Overnights: 0
Rhode Island
Years: 1 First: 1975 Last: 1975 Overnights: 0
South Dakota
Years: 1 First: 2013 Last: 2013 Overnights: 0