Last week we played a doubles 500 point battle using a custom scenario we made up on the night. Pippin, with an escort of Rangers has to escape the Haradrim and light a beacon on the far side of the table. (Why it had to be Pippin doing it we didn't really clarify but it seemed like a reasonable thing).
We played on a 6x4 with lots of forests and hedges. We set up a small settlement around the middle and two watch towers, one on the centre line and the other in the back corner, this is the location of the beacon.