This info is from a site(link below). Sorry for formatting, on a tablet. Info is at link below.
Alabama
No overnight parking or camping.
Arizona
Overnight parking permitted; no camping.
Arkansas
Overnight parking for safety reasons only; no camping
California
There is an 8-hour stay limit. No overnight parking or camping.
Colorado
No overnight parking or camping.
Connecticut
No overnight parking or camping.
Delaware
There is a 4-hour stay limit. No overnight parking or camping.
Florida
There is a 3-hour stay limit. No overnight parking or camping.
Georgia
No overnight parking or camping.
Idaho
There is an 8-hour stay limit. Overnight parking permitted. No camping or sleeping outside of vehicle.
Illinois
There is a 3-hour stay limit. No overnight parking or camping.
Indiana
No overnight parking or camping.
Iowa
Overnight parking is limited to one night with extenuating circumstances; no camping or sleeping outside of vehicle.
Kansas
Overnight parking is limited to one night; no camping.
Kentucky
There is a 4-hour stay limit. No overnight parking or camping.
Louisiana
No overnight parking or camping.
Maine
No overnight parking or camping.
Maryland
There is a 3-hour stay limit. No overnight parking or camping.
Massachusetts
No overnight parking or camping.
Michigan
There is a 4-hour stay limit. No overnight parking or camping.
Minnesota
There is a 6-hour stay limit. No overnight parking or camping.
Mississippi
Overnight parking permitted; no camping.
Missouri
Overnight parking permitted. No camping or sleeping outside of vehicle.
Montana
Overnight parking permitted. No camping or sleeping outside of vehicle.
Nebraska
There is an 8-hour stay limit. No overnight parking or camping.
Nevada
There is a 24-hour stay limit. Overnight parking or camping permitted.
New Hampshire
There is a 4-hour stay limit unless emergency conditions exist. No overnight parking or camping.
New Jersey
Limited overnight parking; no camping.
New Mexico
There is a 24-hour stay limit. Overnight parking permitted. No camping or sleeping outside of vehicle.
New York
No overnight parking or camping.
North Carolina
There is a 4-hour stay limit. No overnight parking or camping.
North Dakota
No overnight parking or camping.
Ohio
There is a 3-hour stay limit. No overnight parking or camping. Overnight RV parking permitted in some areas on toll highway.
Oklahoma
Overnight parking permitted; no camping.
Oregon
There is a 12-hour stay limit. Overnight parking permitted; no camping.
Pennsylvania
There is a 2-hour stay limit unless otherwise posted. No overnight parking or camping.
Rhode Island
Overnight parking permitted; no camping.
South Carolina
No overnight parking or camping.
South Dakota
There is a 4-hour stay limit. No overnight parking or camping.
Tennessee
There is a 2-hour stay limit. No overnight parking or camping.
Texas
There is a 24-hour stay limit. Overnight parking permitted; no camping.
Utah
No overnight camping. Extended stays are permitted and are monitored by the on-site staff and the Highway Patrol.
Vermont
No overnight parking or camping.
Virginia
No overnight parking or camping.
Washington
There is an 8-hour stay limit. Overnight parking permitted. No camping or sleeping outside of vehicle.
West Virginia
No overnight parking or camping.
Wisconsin
No overnight parking or camping.
Wyoming
No overnight parking or camping.
https://www.interstaterestareas.com/overnight-parking-rules/