I try to remember to consult Gas Buddy when I am traveling, so you can save some money here and there by paying attention. I believe you can sign up to contribute your live fuel price findings and win gas cards. I haven't looked into that lately.
http://www.gasbuddy.com/gb_gastemperaturemap.aspx
My credit card offers those funny perks, you can choose from assorted gift cards with points earned, one of them is ordering up prepaid gas cards, so I wiped out all my points to get some gas cards. At least I had enough for two tanks of gas, not shabby. Well by the time I finish typing this, could be 1 tank of gas...
It's true, nobody buys an RV because they are hedging the fuel costs will plummet.
When I bought my motorhome over a year ago, the former owners claimed to be selling because of the fuel prices then... At the time, I thought it was so sad. But I was more than happy to cash in on their supposed woes.
I guess I better figure out what my MPG is. Last time I went over the log book, I just did quick calculations on gas spent and miles driven, it was 30 cents a mile, guess I should figure a little more accurate and stick to MPG so I can sort of guesstimate my future trips.