Well sounds like Crappies aren't recommended for a pond this size.

WE
SMB
YP

Would NP be too many predators? I don't see them talked about too much but I see a good chunk of the members here are from the South so that makes sense.

Some type of baitfish and crawdads. Really don't think I'd put feeders out as I'd like to keep it as natural as possible and honestly would rather spend the money on improving the habitat to improve natural food.

Tonight I'm going to get a rope, tie a brick onto it and mark every 12" with duct tape and write down the depth on the duct tape. I think that would be the fastest/easiest way to record the depth. Probably get out in the kayak tomorrow as I have the day off.