Betting the Dead Man's hand vs. 5 OOP

[nomadtla]

Just average dummies in the hand, except the button but he folds on the flop. UTG is (32/12/1.5 over 70) the kind of player who likes to "mix it up". By that I mean sometimes he calls the flop and turn and folds the river, or bets somewhere with 9h, or slowplays. Very little method to his madness. The rest are too new for any real read but seem average.
What's my line on the river?
advice on any other asspect of the hand also welcome.

PokerStars 0.25/0.50 Hold'em (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is SB with A[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/club.gif[/img].
UTG calls, <font color="#666666">2 folds</font>, MP1 calls, <font color="#666666">1 fold</font>, MP3 calls, <font color="#666666">1 fold</font>, Button calls, Hero completes, BB checks.

Flop: (6 SB) A[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(6 players)</font>
<font color="#CC3333">Hero bets</font>, BB calls, UTG calls, MP1 calls, MP3 calls, Button folds.

Turn: (5.50 BB) T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">Hero bets</font>, BB calls, UTG calls, MP1 calls, MP3 calls.

River: (10.50 BB) 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(5 players)</font>
Hero ?

I bet the flop and turn to keep free cards from lone [img]/images/graemlins/heart.gif[/img]'s and to make another A pay too.