Do you bluff here?

[Moonsugar]

Hand converter busted [img]/images/graemlins/frown.gif[/img]

$55. You have semi-tight, aggressive image. Have shown down some big hands but also folded to big bets. Opponent in this hand is a tight player. Blinds 50/100.

UTG 1305
UTG+1 2010
Hero 2975
SB 1870
BB 1840

Hero holds J [img]/images/graemlins/diamond.gif[/img]10 [img]/images/graemlins/diamond.gif[/img]

Fold, fold, Hero raises to 300, fold, BB calls. Pot = 650.

Flop 2 [img]/images/graemlins/diamond.gif[/img]9 [img]/images/graemlins/club.gif[/img]7 [img]/images/graemlins/spade.gif[/img]

BB bets 200. Hero Calls. Pot = 1050.

Turn K [img]/images/graemlins/diamond.gif[/img]

BB bets 300. Hero Calls. Pot = 1650.

River A [img]/images/graemlins/heart.gif[/img]

BB checks. What do you do?

And if you bluff, what % of the time will you bluff and what do you bet?