I'm with Mr.Mark. I gave up on the RV lanes years ago after a couple of bad experiences...mostly related to the throughput speed (slow pumps, multi-card swipes, folks taking their time shopping, airing tires, washing bugs off the front etc. etc.)...all this creating long lineups in relatively limited space.
There's plenty of room around the truck lanes, the truckers don't muck about, the pumps are way faster, you can get DEF if you need it and, if you have the Pilot/FlyingJ RV card, you can fill up without going inside first and you get a few cents off. Diesel only, of course, and remember to get in, get your job done, and then pull ahead before you go in to pay (i.e..try to stay out of the way of the folks still working for a living).
I find this much less stressful and time consuming. FWIW