i know a guy that used to go past richards creek in a 32 ft wooden boat and a 115 hp outboard jet. fact he ferried my horses across the river at the big bend.
Here is a fellow I know (Tyler).........2nd person I have heard boating this far and both of them obviously not afraid of denting their boat..There are major boulder alleys and shelves from dowstream of besa to up past Kravic creek. I also own a river boat and thought about taking it up there many times, but it must be still "too new" as common sense kicks in!! lol