Easy money, need about a coffee cans of rocks stones picked up

My brother is marrying his fiancée, who grew up going to Lily Cove on Kezar Lake in Maine in the 80's. I am the officiant of their wedding, and as part of their ceremony, I am in need of about a coffee can's worth of pebbles or nickel to quarter-sized stones, gathered and mailed to me. I originally had the idea to travel to get them myself, but I live in Star Valley, Wyoming, and the trip is too much. I'll pay $100.00 for someone to do this. Serious inquiries only, you will need to prove the rocks are coming from the lake by sending a video of you at the lake and gathering the stones. This is a very import and meaningful task for the right person.