Wetsuit or no wetsuit for HIM swim.

I'm currently having an internal debate on whether to use my wetsuit for my upcoming HIM in 2 weeks.

Here are the details:

1.  OWS in a murky lake that is supposed to be 72 degrees.  That makes it barely wetsuit legal, with no jellyfist or sea nettles to worry about.

2.  My suit is a QR Full suit.

3.  I've done full distance swims w/o the suit and haven't had a problem with the distance besides from being generally tired.

So, here is my dilemma.  I don't really feel the need to wear the wetsuit for the swim and I'm actually more worried about wearing the suit and becoming overheated on the duration of the swim.  I'm not going for any sort of specific time goal (except under 8 hours) and was thinking that it may be better to keep my body cooler on the swim to keep the HR down than risk over heating with a full suit.

On the other hand, the additional bouyancy may help to preserve energy for the rest of the race.

Comments?  Thoughts?