I guide for one of the Whitewater Rafting and our commercial launches are about 9:15, 12:15, 1:15 & 4:15 at Sho. There is a possibly of a couple after 4:15 for 2x or 3x "extreme" trips. We were also running laps with the rookies all day yesterday and assume we will be on Thursday as well.
If you show up and there is a yellow Incept just ask we'll try and help you out. I know I'm scheduled for a 12 & 4 Thursday so I should be up there, blue astral with a orange whistle attached with yellow rope. If you don't see me it might be helpful to say that Taylor sent you.
I know that we will run shuttle for Kayaks (don't know the cost though but shouldn't be much) just call (800) 993-7238. If you're in a raft then you could probably drop it off at Sho and drive down to our headquarters (just up stream of the Kayak wave) and ride up with the commercial guys.
Personally I would just leave your car and trailer at Grizzly Creek and it usually isn't a problem finding a ride up from Two Rivers with someone else.