F-H, The only thing I can add from my experiences was with the winterkill I had last winter, my first winter with trout and they all died, none of them floated up and only saw 2 remains in shallow water. The pumpkinseed and GSH were fine, but I didn't have aeration, and unlike your pond mine is only 8 ft deep.
As Theo said with your pond depth and being the first year hopefully they'll be ok.
This winter I had aeration, but with the severe winter, the pond dropping 3 ft, and more than 200 inches of snow I won't know till ice out.
Here's the pond on 3-16-09
