i'm a new pond owner, and i can't find my fish. help!

here's what i've got:

- 20 acre feet of water
- 5 acres of surface
- two areas that are about 10 feet deep
- aeration pumps running in the deep areas
- summer water temperatures at the surface about 72 degrees
- summer clarity about 2 feet
- in winter it freezes
- i ran the aerators through the winter
- i'm up in the rocky mountains at 8,000 feet
- there are small plants growing on the bottom, and a little algae floating around

so, last october i got some fish:

- 110 count of LMB, 6"-8" in length
- 2200 count of BG, 3"-4" in length

i don't live up here full time, but i'm up about once a week - i never found any dead fish floating when the ice melted away. there is a spillover, and maybe they all died and floated down the spillover into the creek?

i can't seem to see any sign of the fish. i see bugs swimming around in the water, and that's about it.

is the density of fish so light that i'm just not finding them?