Don't just put up a standard 80m inverted V, get a roll of cheap RG58 and put up a double bazooka in the widest Inv. V formation you can - wide band, low noise and very effective. At a centre height of 50ft it should work very well.http://www.bloomington.in.us/~wh2t/bazooka.html
There is much more info than this avail. but this gives the basics.
Another useful tool is a recieving loop only a few feet off the ground, often stuck around a perimeter fence - very quiet but effective if tuned to freq. Then use a tuned vertical for transmitting only. Verticals might be noisy on recieve, but remain a most effective transmitting antenna.