[overlander63]

A few things to think about:
Motorhomes are taller than comparable trailers.
You have to get a motorhome at least 3-5 feet longer than a comparable trailer, to get the same usable space.
Trailers don't have engines to break down or require mantenance.
If your motorhome breaks down, the vacation is over, and requires a heavy duty tow truck.
Motorhomes are inherently more complicated because they have two separate systems, drivetrain and camper.
On the other hand, it is extremely hard to jacknife a motorhome.
When you get where you are going, the dinghy will use much less fuel than the tow vehicle for the trailer.
You can have the air conditioner or heat going so when you get to the campground, everything is already cooled off or heated up.
You don't have to stop for potty breaks.
Both have their own sets of safety concerns, as well as advantages/disadvantages. It really will be up to you which you feel more comfortable and safer in.