24/7
24/7 with a few stops would be the plan. Two weeks, maybe three. Our Mar/Apr can be pretty unpredictable, with even feet of snow possible. If northern MI weather is 4-6 weeks behind us in spring, it could make for some uncomfortable delays or uncomfortable sailing. The boat is a Tartan 37, so I don't think that's the limitation.As for the 18 footers, I can assure you I wasn't out in the middle of the lake with a tape measure and an anemometer. I don't listen to the TV weather at all for lake weather (guess I'm not a sailor??). NOAA and wunderground reported something on the order of 18-24' as I recall. The waves crashes at Mentor Headlands were some of the worst I've seen in a long time. The winds were picking up beach and slinging it like a sand blaster into the treeline. About ten winters back I remember a noreaster slipping the gap at the east end of the Fairport breakwall and sending very large waves against the shore under the Harbortown Pointe restaurant (or whatever it's called). The waves appeared to be near topping the 10-15' or so of wall, occasionally crashing to send volumes of water another 10-15' up the side of the restaurant tower. It's always humorous to hear powerboaters come in from 10-15mi out fishing trips, white knuckled with stories about the 8-10 footers when it looks all of 3-5' or less from the deck of a sailboat.Out of curiousity, how are you arriving at your max wave height from max depth calculation? Guesstamation or formula?Letterman - what time of year did Larry make that trip?Bottom line, if it's not going to be a safe and enjoyable trip, we'd probably just go with land transport either to Toledo or the whole 9yds to Geneva.Ross - thanks, I need northern MI. I'll check your link for it.