this is what we used:
a Vector Power City unit. veco28ac
( we do these music/camping things like mini burningmans so we were very prepared)
you get it at auto supply shops.
it ran our 3 air pumps.
it has dual 12V dc outlets,
200W dc to ac inverter,
portable jumpstarter,
inflator/deflator,
removable light,
and is silent( x-cept when inflating yer airbed...)
and small.
Walked for 4 hrs to get home from manhattan to the fishies.
they were ok, but we hooked up the vector and all four tanks were fine thru the night.
it was like an oven tho, so we weren't worrying about the heater, will do a H2O-x tonite to help the water quals get back on track.
good luck everyone!