I agree with Tithers, don't bother with the wetsuit in a sprint, unless the water is freezing.

Wear your Tri top and tri shorts under it, or swim in that.

Do at least one brick before the race. You have time. Believe me, you don't want to run off the bike for the first time ever in the race. Also, it takes a few minutes to get your legs back when you do this, so don't worry. It takes me from 4-10 minutes for my legs to feel somewhat normal.....

Good luck!

I'm on Dawn's side for this one....wear a wet suit if the water temps are cool enough that you won't overheat AND you are sure that you can get the wetsuit off fast enough after the swim so as to not lose any of the time advantage you have made from wearing it in the first place!

wear whatever you are comfortable racing in. If this is your first race and you don't have a tri-suit or tri-specific clothing, then maybe wear a bathing suit under your wetsuit and either race in the bathing suit or put on shorts and a top. Since you are racing to complete and not for time then you can spare the few extra moments in transition and race in clothing you already own. No need to buy extra clothing at this point.

Lots of places where you rent wetsuits give them to you for 3-4 days. If you can practice taking it on and off and get some OW swim time in one give it a try. I will tell you I did two OW tri's last year without a wetsuit then my first one this year used the suit I just bought. Only had 5 minutes in the water with it prior to the race. The suit totally freaked me out during the race. So unless you get some practice in it, it could have a negative effect on your race. The other option would be to rent one for a long weekend when you don't have a race and get a real feel for one.

Also, just fyi, in the tri's I did last summer without a wetsuit, I wore a two piece suit with a really good support top and bottoms I had also tried out running and biking in. NEVER anything new on race day. Then when I got out of the water just put my bike shorts (didn't have tri shorts back then) on over my bathing suit bottoms and a running top over the bathing suit top. It was enough support like a sports bra, but then remember I had tried this out prior to race day.

Good Luck!

Is there a buoyancy benefit to a wetsuit? If so, how much?