We have a Goldstream Wing 3 which is the same layout as a Swan. We looked at some hard-floor campers initially but they don't really suit families unless you start putting up annexes which we didn't want to do. The Swan/Wing layout lets you seperate the kids if need be by having the seperate lounge and meals seating areas.
Setup for us takes us between 10mins (basic leveling, setting end stays, connecting power and water if neededm, no bed end flys errected) and 25mins (bed end flys and uneven ground which nesseccitates extra leveling tasks like parking a wheel on a plank of wood)
Packing up is directly related to how much junk you take and where you store it. If your kids spread the contents of the camper around the site, then it doesn't matter what you have to pack them into, you still have to retrieve everything 1st! Ours is setup so everything has is place (and won't fit anywhere it's not supposed too!). We tend to do a clean up the night before so that in the morning we only have to clean up the breakfast dishes. I put chairs and tables away in the front boot, BBQ in the car, etc.
Once we get to the point of dropping the roof, we put the kids in the car to read a few books and proceed to drop the roof. If it's raining and the bed end flys were errected, you can leave them up until the bed ends are packed away which stops them (and you somewhat) getting wet.
The more we use it, the better we are at getting it packed up. Things like working the best way to fold the canvas so it sits best are fine tuned along the way.