KK call, raise or fold flop check raise??

[mongoose51]

Villian 20/7/5 for 100 hands. No other reads on him. Do you call, re-raise, fold to the flop check raise. Then what is plan on the turn?

Party Poker No-Limit Hold'em, $ BB (10 handed) FTR converter on zerodivide.cx

UTG ($13)
UTG+1 ($96.50)
UTG+2 ($136.75)
MP1 ($187)
Hero ($150.55)
MP3 ($98.50)
CO ($104.70)
Button ($56.80)
SB ($203.15)
BB ($113.35)

Preflop: Hero is MP2 with K[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/spade.gif[/img]. SB posts a blind of $0.50.
2 folds</font>, UTG+2 calls $1, 1 fold, Hero raises to $5</font>, 5 folds, UTG+2 calls $4.

Flop: ($11.50) 5[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/spade.gif[/img] (2 players)
UTG+2 checks, Hero bets $8, UTG+2 raises to $30, Hero ???