harder to find but they are out there
We are in our second season with our 40ft 5er. Like others have mentioned, sites are out there but not as numerous as 30 and 36 foot sites. Another consideration too it that a 5er is considerably taller than a TT which can create headaches in older, forested parks. We have found that we have to be very preemptive and make reservations very early to insure we get a site that we want and that we will fit into. RV resorts are always an option and we have stayed at a few of them. Even in some resorts like Frontiertown at Ocean City, what they call a 40 foot site is tight leaving you wondering where to park your TV. The Villages at Turning Stone, they have hundreds of 45 foot blacktopped sites... Our local KOA is site specific and the staff picks the best site for you according to their tastes, not fond of this, but by doing this they don't have a 12' pop-up in a 40 plus site. Most state campgrounds have a handful of "big rig" sites but you may need to be very good at backing up your unit to make them work. They also quite often have a few reserved "management sites" that can't be reserved online that they can use to fit in units that won't fit elsewhere.
Working because we have to - camping because we want to.
2015 Salem Hemishere 337 BAR
2014 Ram 3500SRW Laramie 6.7 I6