Wow! Absolutely amazing...
It would seem to me you should be able to support trout in that pond. Perhaps in lower numbers than the original numbers you stocked. Even if the trout do survive, you can still consider stocking HSB. The trout and HSB should do fine together. If you feed, you should be able to grow some real nice fish. Your boys are gonna have a lot of fun fishing there! I can't wait to see the pictures once the vegetation fills in around the pond edge.
Keep us updated!