My friend and I attempted the Huckleberry Finn European Extreme this weekend.
>Felled a dead elm tree on his parents farm
>Cut logs to proper length
>transported logs to river
>Middle aged couples looking at us assembling log raft like we are convicted serial killers
>lash all logs to a platform
>Ready to float this bitch 5 miles to complete European Extreme challenge
>Stand on raft and realize it only supports one person

Apparently you need some big ass logs to support 2 men, and I feel like elm isn't the best wood to use, but it is all we had access to at the time.

General log raft building tips? What would the most buoyant wood be? We had a canoe paddle that I carved and a push pole that we made out of a small boxelder, but we still had a hard time maneuvering it individually.

Hopefully we can get some bigger logs and complete the challenge, sorry to let you down sc/out/s.

pic related