Great Lakes Plaque
There is a great lakes plaquard that we have mounted regarding garbage overboard, but other than that I do not know what else you would need.It will be colder than a witches you know what in April. The water temp will in the 40 degree range. Be sure to have a dinghy or life raft. If you have an emergency you would not last more than 30 minutes in that water.The great lakes are like a heat sink. Does not warm up until June and stays moderate until early October.Good luck.