Flying J is the only one that has the dedicated RV lanes unless they specifically state otherwise. So far as I've seen, the truck lanes only offer diesel and DEF, both on the driver side. They could have a gas lane, just not sure.
2015 Legacy SR340 360RB
2014 Jeep Wrangler Unlimited Toad
Gigi, Poppy and Sadie Lady...On the road, but not full time!