playing low straight draws first to act against 2 opponents

[slik]

My two opponents are unknowns, but from the few hands I saw, they did not seem too tricky. My question is how most of you would play openended straight draws with this sort of flop against 2 opponents.

Is the check calling better that the checkraise line I took?

Is betting the river obligatory after missing the draw or is this read dependent?

Party Poker 15/30 Hold'em (6 max, 5 handed) converter

Preflop: Hero is BB with 7[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">UTG raises</font>, <font color="#666666">1 fold</font>, Button calls, <font color="#666666">1 fold</font>, Hero calls.

Flop: (6.66 SB) 4[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">UTG bets</font>, Button calls, <font color="#CC3333">Hero raises</font>, UTG calls, Button calls.

Turn: (6.33 BB) T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets</font>, UTG calls, Button folds.

River: (8.33 BB) 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero? </font>

Final Pot: 8.33 BB

[emil3000]

Check-calling is better on the flop with the overcaller. You are very unlikely to blast you way thorugh and oyu don't have an equity edge. I think betting this river is fairly close, but it's a check. UTG seems stubborn about a mid pair.