FYI..Good Sam offers a discount on diesel fuel, which is great and I may have occasion to use it. Here in Central Texas Flying J is charging $2.75 for diesel...I pulled in to a Buc-ee's a few miles fu...
For older coach owners, Flying J may not be an option as some of their stops have gone to 20% bio diesel. Freightliner mechanic in SC told me to only use up to 15% bio. Just for info, do your own research.