[Jeff Hwang]

I think in general, villain would have bet the flop with top two pair or 7-7, in which case your full house on the turn is almost certainly winning. So unless you have a reason to think your opponent might have J-7, then you should pot the turn. Otherwise, you might call the turn and probably fold to another decent-sized bet on the river.

On the river, I would check behind irregardless of tells. He is probably not going to call a bet unless he can beat you (lest you think he is bad enough to call with bare trips), and if he has a full house it is probably better than yours.

Jeff