Try running the 82 mm dipsy on 0 setting, or go with a 107mm. You are probably only about 30' down with the 82 on 3 setting. Although you seem to have been getting your fish up that high. I think you should try getting a little deeper with the dipsy's. I have been running the 107mm out 200-250'.
It has certainly been a spoon bite this year, but my better quality fish have come off a spinny and fly. Don't give up on them. Keep 1 rod with a spinny and a fly, and make sure you get that rod when it fires.
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If you decide to add a leadcore setup to your arsenal, I still have one combo left from last year. Its spooled with 27lb leadcore. Okuma Catalina 30 on a 8'6" M 12-20lb Convector Great Lakes Rod.
Scott