I thought this might be a useful item to post. I printed out a copy to keep in my truck. Del http://www.pilotflyingj.com/assets/templates/pilot/images/RVTG%202012.pdf
We used to stop at Flying J all the time, but not so much anymore.
When Flying J started to charge for a sewer dump and would give a credit towards the dump, unfortunately the credit would expire before we would have am opportunity to use the credit.
Now we just go for the lowest price fuel and propane. It works out well.