Has it really been five years since you've been in the water at all? You need a dive or two at Haigh Quarry in Kankakee before venturing out on the lake.
I'm more than happy to hit Haigh with you and the lake, but I'm unavailable for a couple of weeks. Just got back from Tobermory on Sunday. Need to take a weekend to visit the non-diving friends and get some stuff done around my place, then Intro to Tech up in Ontario the first weekend in August. I'm open for the second weekend in August (10/11). I'll need some dives in my doubles anyway.
ETA: and no, this place doesn't suck the diving out of you. I can easily dive every weekend from the beginning of April when Haigh opens through the end of October when Haigh closes. April and October are pretty much just quarry diving. The Great Lakes (mostly Michigan, some Huron) the other months.