Is there a maximum bus length in State or National Parks?

[greyguzziart]

Well, I guess every State may have their own rules regarding length, but what about the National Parks? Where in general might I not be allowed to camp with a 40ft BB All American? Transit style, custom paint job--no peace symbols or stovepipes. Thanks.

 

[Griff-SKO]

Check out this site: http://www.nps.gov/
You can get the name and details of every National Park the US has to offer!