1/2 oz is quite a bit, here are some suggestions that you may want to try out to get those bites detected.
1) Reduce the line weight to 4lb test, you should see some differences. For carp, various coarse fish and these trout in put and take lakes, 4lb is enough.
2) Float, go smaller. My favorite is
Drennan's Crystal Avon. I have some if you are interested. Berry's and Nikka both have some as well. The 4.5g or 6g size Crystal Avon will allow you to cast fairly far but still retain that sensitivity required. They only take a few small split shots to balance. Add enough weight so the bottom of the red tip is lying on the water surface.
3) Watch the float all the time. Trout are aggressive, they don't mess around with the bait. One bite, the bait is gone. Coarse fish, on the other hand, will nibble away like a gold fish until it wants to fully commit to the bait. Make sure the line between the float and your rod is not sinking (if it is, you may want to add water repellant substance onto the line so that it floats). Having a dry line will increase your hookup speed, therefore less chance to loss the fish.
4) secure the bait better. Try some natural bait. Shrimp is a good one to start with. Secure the bait with spider thread (the thread used to tie roe sacs).
5) If you are strictly catching and keeping the fish to eat, downsize the hook. #4 is actually what I normally use so the fish wouldn't swallow the bait. #6 will probably allow the fish to hook itself.
6) The fish may simply be too small. This time of the year, you'll find lots of small trout (4 to 6 inchers) at Sasamat Lake. If that's the case, try this again next spring (April, May) when the lake is stocked.
Good luck.