I've done the Green & the Colorado through Canyonlands Nat. Park many times. I use a SOT touring kayak. I've had touring kayaks, canoes & inflatables on my trips. The inflatables did ok, but they struggle more with wind & speed. Certainly doable, just a bit more work.
Do you have your park permit already? The permit info will give you all your required gear. Have you booked your jet boat shuttle? I always use Tex's Riverways. They do a great job, and if I remember right, they may be the only shuttle service still operating????
I have always used a Turbo Toilet with Wag bags. The used wag bags are transported out in a dedicated heavy duty dry bag. The Turbo Toilet folds down nice & flat to fit inside my kayak. It holds a wag bag nicely & is comfortable to use, even for me with bad knees.
We have always carried our own water on all the trips I've done. We do carry a collapsible bucket, alum, and a filter just in case. It does add extra weight at the start, but well worth it not to have to settle & filter for me.
The last trip, I used a Fat Daddios anodized aluminum 12 inch diameter cake pan as my required fire pan. Coupled with a fire blanket, it was a functional & light weight system.
Paddle early in the day to avoid wind. Afternoon winds in the canyons can be a real bitch. Have fun. It's beautiful down there!
"We are all visitors to this time, this place. We are just passing through. Our purpose here is to observe, to learn, to grow, to love....and then we return home."
Australian Aboriginal Proverb