Toby, while I respect your opinion, I must say I've been ALL OVER the U.S. in this my secind 45'er and even did the State Park in Mercer,PA.
Yes, you're absolutely correct that most NPS facilities are meant for sub 40 coaches, with a little practice and research it's entirely possible to use the 45'er in a lot of places other than parks...
If one is to be using NPS parks a lot, they'd do better with a smaller coach...
I recommend "Big Rig Best Bets" as a must have addition to the 45'ers coach library.
2019 Grand Design Solitude 380FL fifth wheel
2017 40' Renegade Verona LE LTS (traded)
2018 F150 King Ranch Crew Cab Diesel