kcmoedoe,
Not even close to the same cost incurred to the CG. Where do you think the big rigs water comes from and how is it heated and who's sewer does the used water go into. Absolutely no different than the cost to the CG from the small rig using the bathouse. I know as I got to see all costs and breakdowns while serving on the board for 9 years. Even our family's CG owners say the big rigs have a much higher cost per day to them and most CG's are now realizing it and adjusting their rate systems.
Yes, some big rig people do stay mostly in their RV's but they usually also demand fancier larger sites with some landscaping and nicer picnic tables, nicer firepits, leveler or paved site pads whether they ever use any of the nicer ammenities or not which still all add cost to operating the CG with less ROI (return on investment) to the CG. The smaller RV's usually have more outdoor orienated people and families. They are so much easier to please also. Of course, not the drunks and party'ers as they create many problems for the others who are the normal CG users. Not dissing big rig owners but rather pointing out the facts as they are.
Black and white numbers on financial papers and journals are very hard to argue with!
In general to the OP's question:
Regardless, RVing on average is much cheaper in the long run than moteling or hoteling it as for one major feature, you are not owned by restaurants for about every meal with overpriced food and overpriced both non-alcoholic and alcoholic beverages or coffee etc, sales tax, and tipping. No limit on the ingredients or don't include X or the size of your favorite foods like in a restaurant where a meal is a meal wuth pre-deterimned portions unless you frequent smorgasbords (pig troughs to wallow in till you bust). You also get to choose and see what is actually in the food you prepare and eat. Very important to some people especially as their system. body, and palette can't handle everything that may be in restaurants meals. Of course, you know who slept in your bed last and sat on the white goddess, no hauling suitcases in and out constantly, packing and unpacking repeatedly, most states CG's have no bed tax etc and NO tipping is customary, and the real biggie is cost of the room vs a CG site. There are so many other reasons also! In short, you have total control of nearly everything you like or choose to venture in on your trip including when and where to stay and it doesn't mean just where the hotel or motel is sitting. You can boondock or go luxury.
Try "boondocking" with moteling or hoteling and tell me how that works! I'll just bet they won't move the place out in the country for you to where the air is pristene and the stars are bright and that silence you hear is because there's no cars or trucks whizzing by and horns blaring constantly.