Thompson Beach is a Minnesota DNR public access beach. Camping is an excellent option, but they ask that you limit it to one night. Camping access is by paddle-in only. There are two easy places to launch your boat from, one from the north Twin Points Protected Access. From there it is about a mile to paddle down to the beach. The second option for a put in is Gooseberry Falls State Park, from here it is a longer paddle to get to the beach, between 2-3 miles.
The beach is a great spot to spend the day relaxing, soaking up the sun, swimming in the lake or exploring the area. Just about a hundred yards to the west of the beach is the Gitchi Gami State Trail that is great for biking! So there are endless possibilities to do around the beach. There are 4 designated campsites, and 1 designated firepit just off the beach toward the south end. There are also pit toilets tucked back in the trees away from the sites and beach.
You will want to make sure to pack bug spray, the mosquitos can be bothersome. At times the black flies can be even more bothersome!