Unfortunately I've never done the Rogue, but I've quided a lot of paddle boats, most often full of first timers.
You should be competent enough to turn the boat pretty much on your own when it's full of people and take advantage of the current where ever possible.
Teaching people to paddle isn't a long or hard process, if you think about it all they have to do is hold the paddle correctly, take a proper stroke and understand "forward" "backward" "Left forward" etc. Takes about 10 minutes to teach that. The other part is getting them to work together; your two front people are the key to that, everyone behind them just has to follow what the one in front is doing.
After I got everyone into proper paddle mode, I'd generally turn the boat upstream and see how much power I had; I'd tell em if we can actually go upstream we'll feed you tonight. Knowing how much power you have, and can they keep it straight is pretty much a 10 minute job, and tells you what you have to work with.
Then, depending on the river, you can start dealing with stuff like recovering someone who fell out ("I won't let you back into the boat if you loose your paddle" and"Do not grab them by the collar or arms, take advantage of the situation and grab em by the crotch"), what "jump to" means, and so on.
I ran Northgate once when it was running over 4,500, 3 paddle boats and 2 rowing rigs. We made it to 6 mile in 45 minutes, and I did it only because everyone was experienced with WestWater or Dolores and we had a good crew. I don't think I'd do it again, but man, what a rush!
It was me, and I'd never done the Rogue there's no way I'd take a crew of newibies down. It's the blind leading the blind. Save it for another day.