Check, bluff or value bet this river?

[Barry]

Sorry, been down at FW's for the weekend. It's been mad but some great games.

I thought about c/r the flop but didn't. At the time, I knew that the CO would check behind w/o a K on the turn and 3 bet the flop w/ a K if I c/r. So I figured that I could get the same information for 1 bet rather than 2. Of course the problem with that logic is that there are a lot of cards that could come on the turn or river to beat me, so it's best to get them to fold now. I should have c/r'd the flop.