Yes, I would like to see more RV's that are livable with the slides in. I looked at hundreds, maybe thousands, of RV's for an eye-opening education before I bought mine. I was surprised that many RV's with slides do have problems (living) with the slides in.
Certainly not all of them, but some of them were just designed for slides out only, which seemed silly in my book. But then again, I had a lot of driveway invitations to visit friends and camp in their driveway, where slides might sometimes be an issue.
Generally it seems if you are bookdocking at commercial places, they don't want you to use slides because it blocks a whole parking space. I was in a crowded truck stop one night, that had a 24 hour restaurant and separate parking for RV's and cars. A huge rig had pulled in, then put out all their slides and steps, so that they took up 6 car parking spots. That seemed to me, a rather rude obnoxious thing to do.
Another mega rig came in, couldn't find room to park, with his toad in tow (I guess he was too lazy to unhook it and park it separately in a car spot) so he parked over with the truckers, not using a truck spot, but parking along the curb on their side, making it difficult for the parked trucks to get out the next morning!
As I understand it, you should never park in truck only parking lots ever! Those guys are required by law to park and sleep, so they can get pretty testy to find an RV in a truck only spot. Well, the next morning, I noticed he was changing a flat tire on his toad and a flat tire on his rig. Not sure what happened there... But now many truck drivers had plenty of time to stop and tell him to never ever park like THAT again and to stay out of the truck only area. (I was out walking the dog on the nearby grassy lawn, and witnessed all this mayhem.)
The newer campgrounds are ready for the big rigs. The older campgrounds are not always ready for them. There are thousands of RV parks that still have 30amp only, so make sure you understand how that works, and have the adapter if you are 50amp.
It seems to me, in my past travels, that the county, state and national parks were often very old parks. Many had assorted sized camp spots, not all were identical. Some are built on curvy roads, so the camping lots are eclectic in size. The smaller rigs had no problem fitting in all the spots, but the larger rigs often had a limited few spots to choose from. It just depends on the park. Many government owned parks, just haven't felt like putting it in their budget to redesign the park for loads of mega rigs, to show up all at once, but most have a few spots available for the big rigs. Some of the older parks were designed with jumbo camping lots, so it's not an issue at all.
Also, many older parks don't have a lot of pull throughs, so learning to backup is real handy, if you like the older funkier parks. For you toad haulers, this means unhooking the toad first, sometimes you have to do this on a narrow road, with folks waiting in line behind you, so it helps if you have a system for doing this that doesn't take a huge long time.
I was in a park that had a steep uphill entrance, then it was all flat, once you got up the hill. It was a one lane road that served two way traffic. One guy pulled in, stopped on the steep hill, to unhook his toad. It took him over a half hour to get it undone. Meanwhile cars and RV's coming in the park, had to stop and wait while those trying to get out, had to stop and wait also. He managed to create a mega jam. No one got mad, it was all rather entertaining. If he had waited until he parked at the office, there was plenty of flat room there, to unhook his toad, without blocking anyone (coming or going) at all.
Some parks are dirt only, so you can park any which way you please on your assigned spot, assuming you can fit in it, and figure out how to reach the utilities once you have parked the way you like or the way you fit in it.
Since the majority of privately owned parks cater to big rigs, they are ready for you. Some of the older private parks have redesigned sections or added sections, just for the big rigs.
It is super nice to be able to afford a big rig for fulltiming. However, I am fulltiming in a 28 foot rig mini-motorhome for over a year now, and I just love it. Less junk, less housework, less gas costs, less maintenance, cheap insurance, easier to maneuver and so on. I have all the perks of the big rigs except no slide out, I even have a compact washing machine that does magic. ;D
I've had company travel with me too. I don't have any slides, but my next rig will have slides. Just not sure if that next rig will be in this decade or the next...
So look at all sizes while you are shopping around. With slide outs, even smaller rigs seem huge. If you can afford the biggest rig, by all means go for it, but realize you may have to avoid some of the old rustic parks.