I used to do triathlons about 15 years ago. I know things have changed. i want to do a small sprint tri in my town. my dilema is even though I was always a good swimmer I'm afraid of the 800 yd open water swim. can I wear a wetsuit? its on labor day and the lake is not typically warm. also can i have a life vest or swimmies? I really want to do this race. I don't have free access to open water for practice. what do you think?