Hi Erin and welcome. One of those posts was likely mine and I would like to clarify that a bit. In my case our pickup was rushed because we had to be on the road, that was on me not PC. But I felt lots of things were missed that should have been caught. However, saying "PC does not do a final inspection" is certainly untrue. They do have a final inspection but perhaps it is not as thorough as we might wish. And with new owners I hope more attention is being paid to this. And this was my first RV, so I would have caught a lot of those items on the walk through if I knew what to look for.
However, buying an RV is not like buying a car. The customer must take a certain amount of responsibility for checking and making sure things work to their satisfaction. Often that is called a walk through or pre delivery inspection. Earl or Kyle will do that on your coach, but they will not catch everything, and some things are impossible to catch until the coach has been lived in a bit. Not saying that is right or wrong, it is just the way it is.
To answer your question:
Plan on spending a minimum of two nights locally before driving off into the sunset. The area has lots to see anyway, so enjoy it.
Check everything:
1) Every door, latch, knob, screw, switch and valve. Both inside and outside.
2) Check all of the electric receptacles both 120 and 12 volt and USB
3) Check all of the plumbing. Fill the tanks and dump the tanks. A couple of times. Check all of the faucets. Check the water heater both electric and LP.
4) Check all of the appliances. Including the furnace, heat pump, water pump, air conditioning, stove, microwave, TV, generator and so on.
5) Drive the rig in different kinds of conditions, both traffic and highway. Get it up to speed on the interstate and get a feel for it.
6) Use your order sheet and build sheet and make sure all options you ordered were installed.
An RV is a complex set of systems designed to work in a variety of different situations. And you have to test things both when plugged in and when not plugged in to shore power because the rig will react differently. And under current conditions and under other extremes. One example from my coach was that the air-conditioning did not work. I tested it at pickup and the compressor ran and the fan came on and it was cold. As in it was 20 degrees outside so of course it was cold. When we got to California it sounded exactly the same but no cold air. Replaced under warranty. Would have been replaced at the factory but I assumed since it ran it would work. And so did the folks at PC. Some things are very hard to test. In April it might be warm, but test the furnace anyway. And the heat pump, or heat strips as equipped.
Take a note pad with you and when you find something that either does not work or you do not understand write it down. Take that list back to the factory the next day and go over it with them. Some things will need fixed or adjusted, some things might be just that you need more explanation. Let them go over your list, then go back to the campground and cook dinner. Check things again, get your gear stowed. Make a new list and repeat the next day.