Ours has two fittings at the front and back of the coach tied into the air braking system.
I just carried a 30 foot air hose and gauge at all times.
As far as always being ready for a trip it just takes time to develop habits and a system.
We bought our first motorhome in 1978.
30 odd years and a half a dozen rv's later we finally have a system to keep from going insane.
It also takes a while to find the bells, whistles, switches and all 5 water drains.
It's always fully stocked with everything except for food. That includes clothes and more importantly, rum.
It takes only a hour or two pack up and leave if we want to.
It's kept warm and dry in the rv garage so doing that in the winter is really no problem.
However; the first few years my wife and I resembled 3 legged monkeys trying to pack it up and get it ready.
Remember: it's an adventure..............