I flopped the nut high, but all I want to do is check/fold

[Proofrock]

I'm VERY new to PLO/8, and I'd like some advice about the following hand that I recently ran into in a tournament.

Stars 20+2 PLO/8 tournament. Blinds are t50/t100.

Preflop: I'm on the BB holding 2[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/spade.gif[/img]. I have t2000 after posting the blind. Five limpers to me, about half cover me, the other two have about t1000. I check.

Flop(t600): 4[img]/images/graemlins/heart.gif[/img] 5[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/heart.gif[/img]. SB checks, Hero ... ?

I'd like a plan for the rest of this hand. My concern is that anbody with a reasonable low hand is free-rolling, whereas I have almost no shot of winning the lo, and there are a lot of cards that can kill my straight.

Thanks.