Changing a flat on a dually isn't much more difficult than a single rear wheel truck. There will be 8 bolts instead of 5 to remove but then the wheels slide off just like a regular single wheel. I only ever use the bottle jack that came with my truck so you don't really need hydraulic jacks. Although the hydraulic jacks would be better with the extra weight of the camper. One jack is all that's needed.
When reinstalling the wheels, just make sure the outside wheel tire valve is lined up with the inner wheel tire value so you can easily check tire pressure. My wheels have a small hole in each wheel amongst the bolt pattern that indicates where the valve is. I imagine most do. This just makes it easier to line up the two wheels - just align the two holes.
One thing about the truck tires in general, they are E Load rated or better so they have thick sidewalls which makes these tires heavier. Also the dually wheel is typically heavier... a AAA membership with RV Plus might be a good investment.... that's what I have
You might also want to add some valve extensions on the rear wheels to make checking/adjusting tire pressure easier. They just screw on in place of the normal valve cap and are under $10 for a set. Mine are plastic but do the job. Although I have found that the dealers have difficulty putting them back in the right spot after maintenance, even when you show them where they go.... or maybe that's just my dealer.....
Sorry, I haven't found any forum guidebook but that doesn't mean there isn't one.