It sounds like you've got a wonderful pond going there, so congratulations!!!
Regarding the Yellow Perch and SMB, conventional wisdom says to stock the YP first, and the SMB later, however, as you've outlined how far you have to travel to get the fish, it's reasonable to stock them at the same time. For 1.4 acres, I might go with 200-400 Yellow Perch, maybe more, and then 50-100 SMB. The fatheads should spawn all summer long, but they'll get eaten out pretty quick (not all of the fatheads, but so much so that you won't see them as much as you do prior to stocking).
Regarding the trout, I might wait until 2025 for those just to see how the SMB and YP did. In Maine, you may have a chance of year-round survival without summer trout kills like many of us experience. Trout can get pretty big in a pond, and I'm not sure what kind of forage base would be needed to feed the trout as well as the YP and SMB, hence my thought to wait. If you just can't wait, maybe stock a lower # of trout, say 25-50.
Aeration never hurts, but isn't always necessary either. I'd see what others have to say about that.
On the crayfish stocking, one risk I hear of is that they may denude the pond of vegetation, but I think you've already got established vegetation. Maybe 10-30 lbs of crayfish???
I don't know much about water chemistry, so let's see what others say.
