Last year, I launched my boat on April 13. I was able to get to my cabin on Rainy Lake on April 16 and we had the water running April 21.
It was the earliest we had ever reached and opened our cabin since starting records in 1968. Our hot tub was filled and heated, and we watched the sun set over Sand Bay.
On the other hand, we have been as late as the second weekend in May in travelling to the cabin.