I think I would have followed through on the turn since the straight draw gives me enough outs I'm calling anyway. If he raises the turn, that bites, but at least you know you can fold UI on the river or go for a c/r if you hit your straight.

The villian's turn bet doesn't mean much given many aggressive players will bet with air when it's checked to them in an attempt to pick up the pot. The river is hard. I wouldn't be suprised if he bluffs 1/6th of the time, making a check/call worthwhile, simply because I probably bluff 1/6th of the time when the original leader showed aggression and then let the lead go.

I think bet/fold will net you less than check/call because given the board I see him calling a smaller range of hands than he'll bet due to the chance he'll bluff.