I have found it very confusing. There was the older RV discount card and the newer swip and save. I will go to the referenced locations to try to get information on what locations honor the discounts and where. I do wish it was consistent. If it gets to problematic will have to stop using.
Montana: It worked mostly across county, but in Montana...first was sent to the truck lanes and then found that not only I did not get the discount but was charged an additional amount because I used a credit card. When I complained to the cashier he was apologetic and said that the Swip and Save card did not work in Montana. So will no longer use Pilot or Flying J in Montana.
Edit: Looked at the list of Dealer owned vs Flying J owned. I have a gas MH so did not use the diesel at the truck lane. It looks like all Flying J in Montana are Dealer stations. I really liked the Great Falls Flying J but that has been a few years ago, oh well.