I'm still wearing a drysuit. It's cold down there.
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Use the link posted by ianr33 to track the lake temps. Divers have been using 5mm wetsuit, some using hoods/some not, same with gloves. I would suggest the hood if you have one.
The local shops can set you up with a rental if needed.
i'll be at windy point for the trim/nav review. any chance of a saturday sunset dive?