Hiya BP, I'm wandering around with this TH which is 43' 8", not counting the dually. I estimate my overall length at around 58 - 59 feet.
I did, down at Ft. Pickens NP in Florida stuff it into about a 40 foot site, but I was hanging over the back from the back tires on. Unloading the bike at the site was out of the question.
I have learned to look for "Big Rig Friendly" and pull through sites, particularly being a solo.
That said, using mostly pull throughs, I have had no real problems on this trip. Just go slow and easy getting in, (that goes for back in sites as well), and ignore anybody trying to rush you. You'll be done when the rig is where you want it...
Good luck, and feel free to PM with any other questions.
'12 F-450 Lariat
05 KZ 45' Escalade Toy Hauler
00 Harley Road King, 94 Dyna Wide Glide, 83 FXR