Flopped trips facing turn bet

[True North]

Just checking my thought process on this hand.

Second hour of a $5 rebuy. Table has been pretty loose-passive preflop, less so after the flop but still somewhat fishy. Villain seems fairly solid. I've been pretty cold-decked up to this point at this table.

PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP2 (t19115)
MP3 (t12360)
Hero (t9510)
Button (t8555)
SB (t18401)
BB (t5955)
UTG (t8724)
UTG+1 (t7725)
MP1 (t15955)

Preflop: Hero is CO with 9[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/heart.gif[/img].
UTG calls t200, <font color="#666666">1 fold</font>, MP1 calls t200, MP2 calls t200, <font color="#666666">1 fold</font>, Hero calls t200, Button calls t200, SB completes, BB checks.

Flop: (t1500) T[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(7 players)</font>
SB checks, BB checks, UTG checks, MP1 checks, MP2 checks, <font color="#CC3333">Hero bets t800</font>, Button folds, SB folds, BB folds, UTG folds, MP1 folds, MP2 calls t800.

Turn: (t3100) 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">MP2 bets t1800</font>, Hero calls t1800.

River: (t6700) J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
MP2 checks, Hero checks.

Final Pot: t6700

Flop - I bet to chase out draws and bring along any tens that might want to call.

Turn - Pretty harmless card, which led me to suspect a nine, probably with a better kicker since he seemed solid. He also could have been betting a ten hoping I was bluffing, but I thought this was less likely. But, it's likely enough that I can't fold yet.

River - I was doubtful he would call with a ten, unless he had JT. He would certainly call with a nine, and may be afraid I made a boat and would be content to take down the pot as it stands now. So, given that and my suspicions on his turn bet, I checked behind.

Thoughts? Anyone bet this river?