Check on the flop was fine with so many limpers. I would call his bet in this spot. On the turn, you may even check again hoping for another bet. I think betting out on the turn scares away hands that will pay you off.

Your options, of course, depend on how agressive your opponent is and how coordinated the board is.

There's a slight chance of a straight draw when the turn comes, but not something I think is going to bust me very often.