It's all about your goals but with 3 ponds you can have quite a bit of diversity. My first thought is to keep the 20 month old away from pond 2 with a 1:1 drop.

Is the land used for a cattle operation? What else is in the immediate environment(other than drought)?

The small ponds might make good HBG and CC ponds, but would need feeders. LMB and BG could probably create a problem.

I think I would use the larger pond as a BG/LMB pond but it still depends on your likes/dislikes.

It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.

Without a sense of urgency, Nothing ever gets done.

Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP Grandpa