I have a Coleman Peak 1 Cobra that I use for backpacking. It's basically a solo tent but it has room enough inside for my backpack to keep it out of the weather. Only drawback is that it's not freestanding (you have to stake it out for it to stand). This could be a problem on rocky or sandy terrain where the stakes won't stay anchored.
Two cautions to heed when buying your tent. Make sure the rainfly comes all the way to the ground (some cheaper models stop about a foot short). Be sure to seal the seams on your rainfly. Those mircoscopic stitching holes will eventually allow water through.
