Rafts CAN still put in at the first launch.
In speaking with a BLM lady and a kayak crew doing swift water training, the magic number seems to be between 700 and 1000 cfs (as far as the wave goes). I have been through it lower and way higher. At above 4k there is a little train on the middle right that I go through when I have my fly rods and stuff. But the kayaking crew said they tried pretty hard to flilp a raft and they really couldnt do it. So youre probably good.
Theres my info- but probably dont listen to me, Ive only been rowing for a year.
"Yeah I called her up, she gave me a bunch of crap about me not listenin' to her enough, or somethin'. I don't know, I wasn't really payin' attention."