(PP 10+1) JTs in the SB

After the flop I've got a gutshot+flush, I don't raise too strongly because I figure that one of my opponents has at least a weak ace (I'm guessing it's the donk-raiser). I'm basically just making a weak attempt to take it down, and if I don't, I've got redraws coming out my ears.

What do you think of this flop play? Should I bet more in an attempt to take it down right there?

I pick up a pair on the turn, but I assume it's not good unless I get another T. Of course, I'm also worried about the straight possibilities. Too many donks call with gutshots in $10s.

What should I do on the river? He's played it so passively, I wonder if a decent bet couldn't take it down.

Thanks,
Will

Party Poker No-Limit Hold'em Tourney, Big Blind is t15 (10 handed) converter

UTG (t785)
UTG+1 (t800)
UTG+2 (t720)
MP1 (t920)
MP2 (t545)
MP3 (t745)
CO (t1125)
Button (t775)
Hero (t785)
BB (t800)

Preflop: Hero is SB with J[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/spade.gif[/img].
<font color="#666666">6 folds</font>, CO calls t15, <font color="#CC3333">Button raises to t30</font>, Hero calls t20, <font color="#666666">1 fold</font>, CO calls t15.

Flop: (t105) A[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets t50</font>, CO folds, Button calls t50.

Turn: (t205) T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t50</font>, Button calls t50.

River: (t305) 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero...