Hope this helps...IME, if water flows and fish can get out, they can get in as well. If you have the ability to draw the forage pond down to start over, your options are wide open. I would start simple and cheap with FHM. With FHM, there is very little to go wrong and the water quality doesn't have to be perfect. But if something does go wrong, it will be a very low cost lesson.
Personally, If the BOW allows it, I like to try and use smaller forage ponds to raise game fish as forage, like YP or BG. I learn about the game fish and if I'm successful (which is rare by the way
) use the YOY as forage in my bigger ponds. This all assumes that I can kill off and restart the forage pond easily and inexpensively.
For me, forage ponds are GREAT fun!