100NL: Value Bet River vs. Nit?

[Kos13]

UTG is ~5/5 and very passive after 55 hands. Do I bet the river, and if so, how much do I bet? Keep in mind stack sizes and the fact that any decent-sized river bet leaves me all but committed to calling a CRAI. Comments welcomed on all streets.

(There were a couple regs at this table, so I have edited the HH enough to hide my identity without changing anything important from the hand.)

Hero (MP1): $111
UTG: $132
UTG+2: covers both

CO posts $0.50
CO posts $1
Pre-Flop: K[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/spade.gif[/img] dealt to Hero (MP1)
UTG calls $1, UTG+1 folds, UTG+2 calls $1, <font color="red">Hero raises to $7</font>, 5 folds, UTG calls $6, UTG+2 calls $6

Flop: ($24) 3[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/heart.gif[/img] 6[img]/images/graemlins/spade.gif[/img] (3 Players)
UTG checks, UTG+2 checks, <font color="red">Hero bets $17</font>, UTG calls $17, UTG+2 folds

Turn: ($58) T[img]/images/graemlins/diamond.gif[/img] (2 Players)
UTG checks, Hero checks

River: ($58) 2[img]/images/graemlins/heart.gif[/img] (2 Players)
UTG checks, HERO has $87 left and is covered by villain