I find these discussions quite interesting. It is a fact that the longer the trailer, the more difficulty you will have finding a place to camp. Of course as the discussion continues you will start to get all sorts of responses. Yes, you can "always" find a spot if you are willing to go private places like a KOA or reserve well in advance at parks that have sites available. It is also true that state and national campgrounds are slowly changing to accommodate larger RVs. With money drying up for our park systems, this change will be slow.
I went from a pop up to a 21ft trailer and now a 25. Each change brought a challenge. We camped at Mt. Rainier and took a spot that would accept our 21ft trailer. It was all I could do to get it in and then I had to park the TV away from our site.
All that said, yes, I do think it is getting better out there. A trailer the one you are looking at should not make it impossible but you will have to plan a little on long trips.
