[azachata]

I would invest in an power inverter instead of the 12V fans. You can find them everywhere for under $50. You can use them for a ton of applications, not just fans, and then you can use the standard AC items/appliances when at home.

I get mine at a discount store about 12 minutes away from my house. They are about $10 for one socket and $15-$20 for 2, but the $20 dual one has 2 fans!