I'm OTB with and the action folds to a villian in MP who raises, this guy has been raising about 30% of hands and will often showdown junk, but his hands are usually something like A48T, 23KQ or A5TT, not TOTAL junk in a HU situation but utter crap in multiway pots. So it folds back to me and I re-raise to get the blinds out, they both fold and the villian calls.

The flop comes down and he checks, I bet, he calls. He could have almost anything here from the straight, a FD or 25xx.

The turn is the and he checks, I check behind.

River is the and he checks, I check behind.

I wanted to bet that river but against this guy I think he's tricky enough to CR with the flush and a crap low (mine would almost certainly be worse, though) - still, I think checking the turn AND river was weak/tight, esp since it's limit and at most i'll have to pay an extra bet to get to SD so getting a 'cheap showdown' shouldn't have been one of my main priorities.. I'm still new to this, though, so any thoughts on the hand?

Yeah, at first glance that's a great flop for you, but that's not exactly the flop you're hoping for here. I still think you bet the turn, if he flat calls then check/call the river. If he checkraises you then you'll have to decide if it's worth 2 more bets to see if he's full of shit or not.

As it played out, once he checks the river you have to bet it. He would have to be clairvoyant to attempt a checkraise on the river after you both checked the turn. It's not unheard of, but pretty rare for sure.

I agree with JD, bet the river on the chance you can push out his 47 low.