Michael am I missing something here? Are you spending a year in South Africa/Mauritius? If you are arriving in Cape Town in March (I think you said at the earliest) and spending a couple of months in South Africa, say April-May, you would be heading onward in the fall into winter, June/Julyish? It is early in the morning here and I may not have read your itinerary properly.
Heading back to Lake Ontario for this summer. Relatively few stops along the way from Grenada. Martinique, Guadeloupe, St. Martin (must have something to do with the French food), then Bermuda, New England and up the Hudson/Erie Canal. We were going to go via Newfoundland and Labrador but June remembered that one of the kids is getting married this summer - details, details!