pebaugh, I can comment based on what I've read here at the forum for a couple of points, and I'm sure others will fill in the gaps.
For the well water, are you running it over rocks or spraying it in order to get some oxygen into it? If not, you may want to explore that.
As far as trout, you may want to comment on what part of MI your pond is in. Trout are a little more of a cold water fish. This is just from memory, but I think they could hold over through the summer if your water temps didn't get to the high 70s.
A lot of pond owners view trout at "put and take" fish. If you stock some in April, and feed them heavily, they can get a lot bigger through the summer.
If you get them hold over the summer, then they may make it through the winter also, however, the chance of getting a spawn is probably minimal unless you create the perfect situation (to which I'm not sure what is).
Someone else should comment on what Rainbow trout like to eat, for instance, are the piscovorous (sp). I believe they are, so adding a few pounds of minnows early on could be good.
EDIT: Forgot to add....Cecil Baird is Sensei Grand Master when it comes to trout raising (not to mention other species). I'm sure he'll comment.
