Your location is listed as Redwood, CA - so I'm basing this on California information.
Commercial RV Parks won't be a problem. You just need to watch for them wanting to put you into a small spot.
COE parks won't be a problem - except as noted above - don't show up on Friday evening during the busy season and expect to have a site available - no matter what your length.
Some California State Parks won't take trailers that long - check the ones you want to visit. Only 22 of 91 parks are listed for trailers 35 ft and longer - only 24% of the parks. Dropping to 30 ft add another 25 parks - total of 47 - which is about 1/2 of the state parks.
CA SP Max LengthSome campgrounds at National Parks in California won't take that trailer, or have very few sites available. You have to check each park/ campground - and want to make reservations for your site as early as possible. Mt Rainier NP won't take rigs that long at either of their campgrounds. But you can get into Yellowstone, Yosemite, Grand Canyon, Glacier.
Many of the most scenic US Forest Service parks won't take a rig that long, especially in the mountains. Some of the roads are simply too narrow and twisted to tow to the CG.
A lot of older federal government and state parks simply were not designed for today's RV. There were designed with popups or 15' trailers as the biggest 'RVs' in mind.
Besides the size of the camping spots - another issue to be concerned about is entry to the spot and the campground roads. I've seen 100' long camping spots which could not take a 30' trailer because there just wasn't room to get it turned and into the spot.
That said - I wouldn't worry about that size trailer.
Yes, it will limit you at a specific CG on occasion - but you can almost always find a nearby alternative. It just takes a little better information and planning.