Congratulations on your retirement. I hope you enjoy it as much as my wife and I do. RVing is a great way to see the country when you are not rushed.
I retired four years ago an we bought a 25 ft. Dutchmen tow behind. Since then have driven coast to coast and border to border. Here are some of the things we learned in the process.
1. You do not need a Gonzo truck, but you do need enough horse power and cargo capacity. Our first F-150 had the cargo capacity but only a 200 hp. motor. That meant slow and constant down shifting. We replaced it with a 356 hp. F-150 with e-boost.
2. You will exceed your cargo capacity before your towing capacity. I can pull 15, 000 lbs. But with my wife, dog and camp gear combine with my tongue weigh put me at the max cargo limit.
3. We started with full hookups at KOA and other camp grounds because they were convenient, had all the amenities and easy to park in. We soon migrated to electric only. We prefer the National, State, County parks be cause they are a bit more rustic and generally seem less crowded.
4. You will find that you will travel about 250 to 300 mile a day, and average 50 mph. Partially because there are a number of road side attractions to visit.
5. Unless we are going to a high tourist area such as the Grand Canyon etc. or happen to hit Spring Break
we do not make reservation ahead of time usually by 1:00 we know how far we want to go then use the internet to find a camp ground down the road. If we do have an appointed day of arrival we allow an extra day or two for travel and camp near by if needs be.
6. Finally carry a spare trailer tire the tools to change it. Now we use a Tire-Aid ramp. Twice knowing how to change a tire (and where to put the jack) was the difference between an annoying 20 minutes of work, and sitting on some back road waiting for Road Service to find you.
Also keep in mind that one persons white knuckle drive is another's slow going. You can never have too much truck but you can have too little. The truck that can handle the load and you like to drive is the best options. We have crossed the Rockies twice and never felt the need for anything bigger.
Good Luck and enjoy the ride