I use (3) 5-gal red plastic containers. It's pretty easy for me to dump them
in--even with a high wing. At my field, I can drive right to my plane, so
carrying them is not an issue. Since my tanks always have a mix of avgas and
autofuel, I never need more than 15 gals at a time. I have it down to a pretty
simple routine. I buy my avgas at a nearby field's self-serve station using a
Phillips credit card, where members of the local pilot's assn get a
discount--currently avgas there is $2.47. Auto fuel is running around $1.45.

www.Rosspilot.com