How much does 30+ feet actually effect ability to find space

Keep in mind it's not the size of the PAD that's important. Rather, it's the size of the ROADS getting to the site. You don't bend in the middle like a fiver or a bumper pull so those posters with a 40' trailer differ from those with a 40' motorhome. That said, west coast is more forgiving than east coast. We're 45' and found we fit in most State and Federal parks. At least those WE want to stay at. YMMV....Dennis

We are 36' pulling a 10' trailer and have never had a problem. We have been full-time for 9 yrs now. However, if a campground says 30'max on their website or info, we just look for another campground, maybe go a little further, stop a little sooner, but have never been without a site.

We have been in state, city, and COE parks where 40’+ would be no problem. And we have been in some where it would be difficult to get 35’ into. Most have some number of longer sites, with many more sites shorter ones. If reservations are allowed, the larger sites go first. Likewise if the park is first come first serve the longer larger sites go first. Waiting til the last minute can be a problem at a popular park.

we, like many others have never been turned away. the real difference seems to be over 40'.
many places we have been our 40' has no problems, but a 43' would be a squeeze.

The answer depends entirely on where you like to camp. Many NPS and FS campgrounds in the West, have mostly tent sites. Trailers under 24 feet usually fit. The older campgrounds barely have room in the west to drive through them with a large rig, much less camp there.

I have run into plenty of campgrounds where there is not enough room for a 24 foot trailer, but many people think their 35 footer "fits everywhere." If your idea of camping is RV parks surrounded by white fiberglass no problem.

SC state park are on the smaller side. Most were built before larger RV's really became a thing. Most places, you just have to book early enough before the larger spaces get gone.

I've never had an issue, ever.

One state park we stay in says it has a 28' max length, our 39'er fits great. Yes I did stop and physically look at the site before we made our reservations and discussed it with the boss at the park. Seems it's a typo on-line, that has yet to be corrected.

On the opposite side of that, about 10-12 years ago we had July 4th holiday reservations at a private park in Old Forge, NY. We made the reservations in January as being the holiday things filled up quickly and the park always sold out.

When we arrived the girl who checked us in offhandedly said "I hope your camper isn't very big". Obviously I was a little miffed. When I asked her how big the site was she said 30'. When I told her we had made our reservations in January and clearly said we had a 40' MH, she said "go check out the site and if it's not big enough we'll see what we can do". I'm not sure what she was thinking as again, they were sold out.

With the help of great neighbors moving all of their vehicles I was able to maneuver the MH into the site, with not an inch to spare. We haven't been back since.

So...if I found a MH I liked I wouldn't let a 34' length sway my purchase even a little. For the one park you may ever miss you'll enjoy the extra room every time you use it.

I only stay at State/Federal campgrounds and have found that a lot of North-East
campgrounds are "tight" for anything longer than 25ft. I found this to be true
PA/NJ/NY.

When travelling west of the Mississippi, camp-grounds tend to get larger, especially in the South-West. Now I understand this is a gross generalization
but the last 3 times I went to PA/DE, I had to a hard time finding a site that I
could back into (and my TH is 20ft). It's rare to see campers longer than 27ft
at these campgrounds and I don't remember seeing any 30ft motor-homes or 5th
wheelers recently.

Rarely does a campground not have space for larger units say up-to 35 feet. It does happen but ask before you go. Older state parks with plenty of shade may be difficult to get into but can be done.

You'll not have any problem finding "RV" sites but if you're into "camping" as in sleeping on the ground in a tent in Forest Service or many primitive camp sites, then units over 30' will present a problem. 34' will fit in most RV park spaces with no problem.