prefferably a large one. must have a waterproof floor & raincover. new or used, as long as it in good shape. lemme know whatcha got…..
http://www.rei.com
get the 4-person dome with the groundcloth. also get some waterproofing spray/gel to put on the seams. follow the directions, set the tent up right (on high ground, no swampland) and you're good to go.