I could conditions at Springstead Landing. 4/25/18
Hope you're kidding... In that bay, all winter long... have him drill a hole... Look at Kurts Island Bait FB page in Minocqua... they drilled to the bottom of the auger... I saw a truck on Stack's bay early this week... Last Thursday south of Minocqua, I had 34" of ice...
I got the boat out and am looking for open water
Take a look at the Facebook page for Donner's Bay Resort. They are posting daily pictures of ice conditions. Today's report, 32" of ice.
The snow is melting fast, but doubtful the main part of TFF will be "ice free" in 12 days. However, there may be some open water where the rivers flow into the main lake, like the Murray's Landing area and near Lake of the Falls.
Right now I'd say chances of open water on May 5th are slim. We still have a bunch of snow on the ice, and another 10-12" of snow predicted for this weekend.
A neighbor was on the TFF ice last week and found 18-20" left. I know the ice can go fast, but the 10 day weather forecast shows below freezing night-time temps thru 4/27, and highs only in the 30's to mid-40's.
My guess is that you may want to think about "tip-ups" for opening weekend.