What about a tarp like the Black Diamond Betamid? I've slept in it under every conceivable conditions: mid winter alpine and BC ski trips, wind storms, rain storms, mosquito infested areas and I stayed dry and comfortable. They can be had for about $79.00. Plenty roomy for two people, gear, and with enough room to cook in. If you are set on a tent, the Stephenson Warmlites are light and roomy.