Bassasassin, whew, that name has too many "ass's" in it to type quickly. No insult intended. If there is power available somewhere in the area why not just run an electric pump near the power and run air lines to the pond. Many threads on here discuss running air line for some distance. I currently run my air 500 feet. But I think you could run air lines a half mile if you had to. Just need to be the right size. Here is a calculator you can use to determine pressure drop.
http://us.kaeser.com/Online_Services/Toolbox/Pressure_drop/default.asp#0 You can run a 1 inch pipe a half mile and pump 5 cfm through it at 10 psi while only losing a little over 3 psi. You will need something like a rotary vane pump capable of 15 psi tops because you will be pushing the 3 psi pressure loss plus 3 psi to get down to 7 feet plus whatever your aerator back pressure is, so figure the pump will probably run at no higher than 10 psi. to move air a half mile! 1 inch irrigation pipe is relatively cheap.
