Those saying they have no problem at FlyingJ/Pilot? That is because they are at the original "FlyingJ" stations NOT the original "Pilot's" which are old truck stops. FlyingJ/Pilot is a merger name.
There are many of the 'original' Pilot stations that did NOT cater to cars let along RV's. I have been in ones like the op stated and it was hard pressed to just pull my Tahoe in for gas. And they always seem to be dirty inside.
I completely quit going to Flying J because of the bad service, lazy register people AND their attitudes. When I drop over a hundred for gas/food I'd at least like to be spared the uneducated gangsta thug attitude from the people taking my money. And this was CONSISTENT across many states. :R
Loves....Big spacious pump area, clean, and in 7 years of full timing I have NEVER had a bad experience at them. Employees are always friendly and very willing to help. When possible I try to make my fuel stops at Loves.