For your goals I would go heavy on the bass stocking. They will be stunted and small but easy to catch, and there will still be plenty of BG for the kids to catch, many of which will be rather large.
In a 3 acre pond in Wisconsin you are far north and really have to worry about BG overpopulation as opposed to a southern pond. So the idea of early stocking of the BG is not needed IMO. This is how I would stock it to produce a kid friendly fishing hole.
First spring after you finish the renovation process:
225 LMB
1200 BG
300 PS
Second spring after renovation:
Another 225 LMB
The PS will add some interest to the fishing. I'd say stock RES but I think you may be a bit too far north for them to do well.
