If I'm not mistaken, the take out would be Treasure Island. Last I knew there was some limited camping there to, including on the island. If its high water you'd float to Saratoga purdy quick. It's totally flat down to I-80. Fun, lazy, drink a lot a Mike's, float in a canoe, but a raft? I don't know, I don't raft.
We did a 2 1/2 day, 2 night trip from Bennet down to I-80.
Bennett Peak put-in or take out requires a long drive on the French Creek road, which is dirt, but not bad. It would be a nice place to camp, its beautiful.