Lake Mead 10k Championships - water temp

Hello fishies :agree: I am considering going to the Lake Mead 10k OW championships in Vegas but am worried about the water temp. I don't have much natural insulation :P the website says it's about 74 degrees. Have others done this race? Do you get cold? Would a full bodysuit (wetsuits are not allowed, but I was thinking of getting a Fastskin sort of suit) aid in warmth? How else can you keep yourself warm? I've done almost all of my OW swimming in a lake in Maine that I think is probably about 74* and I tend to get chilled around the 2 hr mark, so this water temp/this distance are worrying me... but I would like to do it. No pools around here are that cold, so I can't test my tolerance to it... unless anyone has some other ideas about how to test it... tc