KQs in late position - Please comment on all streets

Hi All, here's another fun hand. Please comment on all streets.

Mid game in MTT, Villian has shown that he is capable of limping with all kinds of hands from monsters to connectors, and Ace Rag. No real betting pattern. My image at the table has been tight, hands shown down: AA, AA, JJ, QQ, AK

Preflop:
Was the limp bad? Should I have folded or raised instead?

Flop:
Should I have raised, called, folded?

River:
Do I make a crying call here or fold?

Thanks again for all of your thoughtful replies!

T

$11 MTT

PokerStars No-Limit Hold'em Tourney, Big Blind is t100 (9 handed) FTR converter on zerodivide.cx

MP2 (t3910)
MP3 (t1455)
Hero (t3080)
Button (t1783)
SB (t980)
BB (t4740)
UTG (t2875)
UTG+1 (t2755)
MP1 (t3664)

Preflop: Hero is CO with K[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/spade.gif[/img].
<font color="#666666">3 folds</font>, MP2 calls t100, <font color="#666666">1 fold</font>, Hero calls t100, <font color="#666666">1 fold</font>, SB completes, BB checks.

Flop: (t400) 6[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, BB checks, <font color="#CC3333">MP2 bets t200</font>, <font color="#CC3333">Hero raises to t500</font>, SB folds, BB folds, MP2 calls t300.

Turn: (t1400) J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">MP2 bets t300</font>, Hero calls t300.

River: (t2000) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">MP2 bets t900</font>, Hero ...