Getting value after the worst card in the deck hits

[HelixTrix]

Villain seems like a 'bet when checked to' kind of guy, hence the flop play. Turn bet is supposed to look like 'I just picked up a flush draw'. Should I bet more? River card obviously sucks a lot. What's the play?

PokerStars No-Limit Hold'em Tourney, Big Blind is t100 (9 handed) internettexasholdem.com

UTG (t4530)
UTG+1 (t3030)
MP1 (t10680)
MP2 (t6440)
Hero (t2990)
CO (t3190)
Button (t6135)
SB (Villain)/ (t9115)
BB (t3665)

Preflop: Hero is MP3 with 8[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/spade.gif[/img].
<font color="#666666">4 folds</font>, <font color="#CC3333">Hero raises to t275</font>, CO calls t275, <font color="#666666">3 folds</font>.

Flop: (t700) 8[img]/images/graemlins/diamond.gif[/img], 2[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets t300</font>, Hero calls t300.

Turn: (t1300) 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t800</font>, CO calls t800.

River: (t2900) A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero? (All-In)</font>