National Park Regulations vs. State Law

• 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.
  
  

Maximum Trailer Length

• The average maximum trailer length accepted by the National Park Service is 27 feet, though some parks will accommodate trailers up to 40 feet.
  
  

Permits

• 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.
  
  

Park Use

• 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.
  
  

Trailer Equipment Restrictions

• 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.