bet on the flop. You're the big blind, you were willing to risk 6 bucks on a crazy hand, use a couple of them on the flop instead of the river. if you get a caller, it's easy to check and fold. You being the big blind in an unraised pot can lay claim to all sorts of wacky crap, like two pair. Generaly, if i don't have some sort of hand by the turn i give up, check and fold, but the furious bluff pays off from time to time.

the pot odds are ok, the implied odds cover for the thin call, but the min reraise on the river is always scary. gotta put them on a good flush, unless the're some sort of maniac. but a maniac wouldn't call you down the whole time would he?

the moral of the story is, if you're willing to blow a few bucks on a hand, you're better off doing it earlier rather than later.