If you're boondocking, length shouldn't be a problem. We have a 34.5 foot bumper pull, and never have a problem dry camping out here in the west.
However, we were absolutely not gonna get a sight within Yosemite this summer. Their max length was 24 feet, and total rig couldn't be more than 50 feet in length. I'm at 56 feet total length. We had to reserve a site outside the park, that could accommodate our longer trailer. Not a problem for us, we knew we'd be out of spec for a lot of Gov ran campgrounds, but don't mind driving a few miles to get in.
Your length of trailer shouldn't be a problem in all but the most restrictive campgrounds.