Travelers will have to abide by state law as you travel to a national park. But each national park has its own regulations on issues such as maximum towing speed and safety equipment that might differ greatly from state law.
The average maximum trailer length accepted by the National Park Service is 27 feet, though some parks will accommodate trailers up to 40 feet.
Depending on the park, campers with travel trailers must apply for a permit anywhere from one week to one hour before arriving at the park.
With the exception of checking in and out of the national park, all travel trailers must stay parked in the designated campsite with the engine off.
The use of any trailer equipment that produces a noise level of more than 60 decibels at 50 feet, such as certain electric generators and audio systems, is prohibited.
