I have RVed for over 20 years, starting in a Class C then As. In my growing up days, we tented and then had trailers. Here are some reasons why we chose MHs over trailers.
In bad weather, we can pull in, and basically start enjoying our stay. Elec and water can be connected later. Having levelers does away with the need to use blocks or similar under wheels to get level - push a button and done. Rest stops - you can choose to use your own bathroom without stepping outside and in a pinch, the passenger can use the bathroom while in motion (I KNOW - not safe.)
The routine to hook up a trailer can be quite time consuming and yes, it gets faster with practice. With a MH, you unplug, stow hoses and elec cord, retract levelers and off you go.
MHs have advantages over trailers in other ways -
better storage in most MHs, better insulation often, larger tank storage capacities often, better visibility our windows, onboard generator vs portable to name a few.
Truck pulling vs pulling a Toad (towed vehicle) behind MH - a Toad must be able to be towed by the MH(weight restrictions) and be mechanically able to be towed. There is a cost to getting a Toad setup and purchasing the tow bar/aux brake. It is easy to connect/disconnect quickly. Gives the flexibility once in camp to sightsee and do errands. We did MH only for one trip and quickly decided we wanted the freedom a Toad offers.
You will need to consider which will work best for you now and as you age. What is easy now may well become more difficult as you get more "mature." Look at floor plans and think about travel needs. Take your time, ask lots here and do NOT believe what salesmen tell you without verifying. Yes, there are some excellent and honest sales people but their focus in on moving a unit and getting a commission.
Do your research and here's to many happy RVing years!