Sure - get yourself a pair of Folgers Coffee cans, two APs and position the antennas inside the cans. Make sure both cans have line of sight. You can put contact paper on the cans to hide them or leave them as they are.
I tried this at my brother's ranch. He wanted net access in his tackle shack near the barn. We got decent signal with G from the house. I used two Airlink AP431W. These are kinda special as they act as a bridge, AP, Repeater and a Client adapter. Really functional. He has an acre between the house and the shack/
I got these cheap at Frys for $14.99. Oh they also operate at 5v so in theory you can make an access pod out of one with a solar panel. At that price you could make several pods.
I don't know about N, but I got decent speeds with G. Since my brother isn't too net savy and the house net speed was 1mb we didn't notice any lag in performance.