just check the link
All the above info is basically true. The basic concept is that while you are in sight of the dam, keep it tight. If you've never been there before, you will feel like fish outta water. The place has a vibe controlled by the commercial fishing guides, the federales making sure you don't blow up the dam and the regulars that have been there done that. I like things orderly and actually enjoy the put-in system. That said, some people around there could stand to lighten up. Your best source for information is Trout Creek Flies, the fly shop, gas station, diner, raft rental, shuttle service and quicky mart closest to the put-in. They are super friendly and really make there living getting the out of towners on the straight and narrow.
I'm assuming that you are wanting to launch for an overnight from the dam and will be traveling with all your stuff in a truck and the raft rolled up. My first choice would be to see if you could rig on a trailer at Trout Creek and have them drive you down. Second choice would be to find a private boater who would put your rigged raft on their trailer in the upper parking lot and drop it in. If those options don't work, listen up.
If you have a plan. You can inflate at the boat ramp. By the sign in the picture, upstream of the ramp is a small grassy area for inflating and non-trailered craft. It is usually used by the pontoon boat mafia. If you go when it is slow (ask Trout Creek), you can blow up here. You'll just roll down in the truck and toss out the barrel pump raft, frame, oars and frame straps. 30sec. stop max. While two people are blowing up the raft, the rest of the crew will be organizing everything else up top. When the raft is ready, the rest of the trip and one truck will drive down to the water and take all the gear and make an orderly pile all the way downstream in the tie up area where the blue raft is. 3min. stop max. Drive the truck up top. Don't even rig shit. Put you PFDs on, jump in and find the first eddy and rig. If you've got more than one raft, repeat as necessary.
Point is, it can be done. If you like to rig Upper C style, this section isn't for you. If you approach the put-in like a job, it will be a half hour of work then you are done. As much as I hate "it's cool bro!" boat ramp shenanigans, I think a hate the passive-aggressive "If you don't have a trailer and aint' 100% rigged, you can't boat here" attitude more. Keep it tight, be respectful, discuss your plan with the ranger and you should be fine.