An 8' x 10' will be plenty big; even an 8' x 8' would do. Ergo, you might want to look at a JacksRBetter 8' x 8' silnyl on closeout for $50 right now, I believe, or maybe an Equinox 8' x 10' silnyl. These are much lighter alternatives than you listed, but still economical. From experience the latter will work.