Cool Tia, which club did you join?
I did this float with the Poudre Paddlers last year, and am looking forward to it again. Last year, everyone met at the put-in, unloaded/prepped their gear and then had a short pre-float meeting. Folks were then organized by which take-out they were headed too, and went off in separate caravans. Once at the take-out, people pile into the big vehicles to head back, so if you have a big vehicle (I.e. van or truck) you might offer to drive back. Otherwise climb in with someone else.
At the end, everyone just makes sure the shuttle drivers have a ride back to their vehicles and you're good to go.
"If I'm not there, it means I'm dead...or late!" General W.R. Monger