I've seen a few receiver hitch set-ups that I like, but definitely want to keep the hitch open for a small trailer (possibly a pop-up tent trailer).
CARB crap aside, I'll be going with a standard military style steel jerry can (I already have quite a few of them filled with gas anyway).
President Ezra Taft Benson said to store fuel if possible... I took that at face value and store lots of cooking fuel and vehicle fuel as well.