Yes you can use the truck lanes at Flying J/truck stops etc. in fact most of us prefer them to the RV lanes or other stations. Easier in and out, higher capacity pumps, fresher fuel and no chance of getting blocked in like you can at smaller fuel stations. I won't get into the various methods of payment by credit cards/discounts and such, you can do a search for that, but you will have a large capacity fuel tank so you can plan your fuel stops well in advance, no need to get caught in a must have situation and than trying to fit into a less than ideal fuel stop.
