Regarding a river bluff. I see a lot of guys calling the turn checkraise with high cards that they will fold on the river. In this situation, I am not sure what the villian's turn-call means. If he will frequently turn-call high cards, I think that a bluff is warranted. If he is folding high cards on the turn and is not folding the river more than he should, then I really don't see how the bluff is worth while in this hand.