PokerStars Pot-Limit Omaha High, $0.50 BB (6 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: FCP)

Button ($30)
SB ($73.15)
BB ($20.70)
UTG ($27.40)
MP ($105.85)
Hero ($66.10)

Preflop: Hero is CO with K , 2 , K , 8 .
UTG calls $0.50, MP raises to $1, Hero calls $1, Button calls $1, SB calls $0.75, BB calls $0.50, UTG calls $0.50.

Flop: ($6) 5 , J , K (6 players)
SB checks, BB checks, UTG checks, MP checks, Hero bets $5.7, Button calls $5.70, SB folds, BB folds, UTG folds, MP folds.

Turn: ($17.40) 9 (2 players)
Hero checks, Button bets $16.55, Hero calls $16.55.

River: ($50.50) 3 (2 players)
Hero checks, Button bets $6.75 (All-In), Hero calls $6.75.

Final Pot: $64

I never play a hand like this. I normally would just keep potting on the turn. Whats better?

You have about 17 outs (ok, maybe 14 with cancelling) against any hand other than QT with higher hearts (which likely shoves the flop). I bet/call the turn with villain being short.

Well...the reasonable draw got there. Unless he also has a set or 2 pair, which IMO he could also play this way since you checked when the draw hit on the turn (but less likely than a straight)...

I would bet about 2/3 of the pot on the turn, for the above reason, and probably call a raise to try and fill up or hit my flush

First, only QT got there.
Second, if you bet $12 on the turn, villain can only shove for $11.30 more into a pot of $52.7. You can't fold to a shove getting 4.5:1 with top set and a flush draw.

I don't mind checking the turn, to let button make a bluff hopefully - but I raise him all in there (it really doesn't matter once he bets, all the money's going in anyway)

Haha yeah I just woke up and my vision is still blurred. I fixed my post after re-gaining my sanity