Fifth wheel length

I think it really depends on what state you are referring to. In my area I generally can get a site however there maybe only a few sites large enough.
A larger rig will certainly limit your options at some point.
There will always be more sites available for smaller RV's

Never been a problem for us. Our previous Cyclone and our new Vengeance are both around 43'. Especially with ReserveAmerica.com, its easy to make sure we have plenty of room. The majority of the state parks we visit have about a 90' site length.

We have done the BLUE RIDGE PARKWAY a couple of times between VA and TN. You can certainly tell their camp grounds every 50 miles along the route were originally built for Tent camping sites haha... You do see a few larger RV's in them however...

Our local George Washington and Jefferson Natl Forest areas are the same and getting anything bigger than my OFF-ROAD POPUP trailer might be chore going down their single lane forest service roads... You can do the roads ok it the turns that will hang you up on a tree haha... State parks around here no problem...

Out West you see the big guys just sitting anywhere they will fit along the dispersed camping areas...

I guess I fit the RV CAMPER mold. Never did fit into the RV TRAVELER world where everyone has to have their whole house being brought with them and those expenses that goes with that... Back in the 50s-60s tent camping Mom and Dad slept in the tent and the kids would get in their sleeping bags and sleep anywhere they wanted to. Haha

It costs me the same for gas trucking down to the Smokys at Gatlingburg whether I am pulling my OFF-ROAD POPUP or driving empty... Can make my 450 miles on one tank of gas either way... Thats 20 gallons of gas verses 75 gallons when you only get 6 MPG...

My only maintenance expenses on my POPUP trailer for equipment since 2008 has been a set of tires.. All the other modern items still working great... We very seldom get more than 300 miles away from homeport here in Virginia...

But we all do what we wanta do I reckon...

Roy Ken

Our toy hauler is 41'. We stay in AZ state parks with no problems with our length. We just stayed in a state park in Savanna GA that was long enough for two of our rigs. Haven't tried any National Parks.

we just went from a 23 TT to a 30 6th wheel.. when measured front to rear they are about equal. we chose this because we camp in a lot of federal sites, and have no problem. I think we could go 33 without a problem

My experience has been that most (but not all) state, national, COE, etc parks have at least a few sites that will take a 40 footer. BUT. Those sites are the most popular and grabbed first making it more difficult to get one.

In Michigan it's not a problem at State parks. I have yet to pick out a State park in Michigan that 1) I wanted to go to, and 2) I couldn't fit my 40' 5th. If there is a State park in MI that cannot handle 40', I don't know of it.

I will let those that actually camp in other State's, State parks speak for theirs.

OK this is just my experience. Anything over 35 ft is going to have a problem in state and federal sites. With States of course it will vary state to state depending on when their CG were built or updated. Almost all Federal Parks for certain and to some extent Forest Service CG were all built in the 40's thru the 60's, People did not have huge RVs and the parks were built with smaller campers in mind. So you may find an occasional site that will take a 40 footer, but I wouldn't depend on it. And even if you do it may be one or two sites in a 100 site CG and they are in high demand.

COE CG seem to be the exception they have huge long pads for campers, 75 to 100 feet in some cases.

Anyway that's why we have a 34 footer.

Of course commercial CG are plentiful. And they can take large campers in many cases. But IMO you lose a great deal by camping outside major parks. First the parks are very big and it can take 90 minutes or more to drive into the park every day and the same to get out. Secondly you miss the Ranger programs at the CG

My 36 footer works in many, but not all sites.