Roll hunting anyone?

Any good pro-tips, anyone stilling hunting on a regular basis? Any good stories out there with big finds? Been going through dimes and halfs, I usually get 5-600$ in dimes, rate of return maybe 1-2 silvers. Halfs seem to be about 1 in every 600$. Most of the bank tellers seem ok with me hunting but some have mentioned how they need to start charging per roll I get. I usually try not to tell them what i'm doing.
I really like hunting, and should have started it years ago. I can't imagine hunting in the 60s and 70s, must have been so easy to find stuff?