Flopped a straight, now what (and when to raise/cap the river)?

[NobodysFreak]

My main reason for checking here is that I think if we take the lead, we force out draws like gutshots and OESDs if they whiff on the turn. There are more bricks in that deck than scare cards and I think the risk:reward ratio here is in our favor enough to warrant a check and make the drawing hands pay big bets on the turn with poor odds.

SB seems like he could be a rather tight player. If we bet the flop and he calls and the turn bricks out, he's likely to dump it to our bet, but if we check the flop, bet the turn, I think he'll stick a long with a worse hand more often.

My thoughts on checking the flop were to keep around weak pairs and hope they hit a second-best hand or a weak draw? I probably take this line far to often and don't bet enough for value here.