I had two similar incidents happen to me as a teenager who lived in northern Michigan.
I was an avid skier whose parents couldnt afford to buy me a season pass to Boyne Mountain and thus I was relegated to skiing the local hill in Boyne City which at the time was either Avalanche or Barn Mtn. I was playing in a grove of pine trees up the road from my house one day when I discovered a pair of new Hart skies which someone had obviously stolen from Boyne Mtn. and hidden them in this pine grove. Me being a kid who was still skiing on wooden hand-me-downs from my more affluent cousin in Charlevoix was literally drooling over these metal skis. Don't ask me how, don't ask me why but they were there! Probably stolen by one of my neighbors but to this day I can't imagine who.
Anyway, I turned them over to the local police dept. and that was the last I heard of it.
Several years later at the age of about 15 I was enjoying a rare opportunity of getting to ski Boyne Mtn. when I found a wallet on the ski slope that was packed with money and stuff. Me being the good honest kid, I took the wallet down to the lift operator and turned it over to him thinking that he would find the owner and give it back.
Years after that incident, now knowing what I know about "lifties" (I was one once) and seasonal ski-bums, I wish that I had taken it home and let my parents contact the owner. It would have been guaranteed that he would have gotten his wallet and cash back intact..............
Do whatever is in your heart but rest assured you are going to be paged by anyone passing by your notice.
Wads of cash are usually carried by individuals dealing in quick purchases or sales rather than credit cards or debit cards.