I hate to see everyone painted with the same brush. There are some very good mom/pop dealers out there that not only want to sell you a RV, but want to sell you your next one as well. Years ago when we were looking for our first TT, we were >50miles away from home and a nice couple who were also shopping told us to "go to such and such dealer- they are worth the drive". Turns out that dealer is our hometown dealer not 5 miles from our house. And yes, they still get our business.
Compare that to my locl CW where we were treated worse than the sleaziest used car dealer you have ever heard about. And when reported, that behavior was ignored by CW upper mgmt.
Tip: always ask if the salesman is on commission. It matters AND tells you how much more you can negotiate downward.