Camped about half the time the last five years and watched a lot of folks pull in set up and then take down to leave. A large fifth wheel will take longer, so if you are a traveler vs sitter you will use more time setting a fifth wheel. When it is raining, you may not have to get outside the MH to setup, run the gen set. When the DW needs the third potty stop of the day pulling into the road ramp to make a sandwich and beer while she goes to the pot is easy. Ups, make that a near beer.
I am a MH guy so I am biased
pops