First, look at Grand Design, one of the top manufacturers of RVs, while there are others like Alliance, Jayco, etc. My wife and I have been camping since we married 57 years ago. When looking at an RV, my first goal was to ensure I could get to and from the bathroom/bedroom with the slide-in. Until my GrandDesign fifth wheel, I was able to ensure our trip would not be ruined due to a slide motor failure. The biggest issue with RVs today is storage for clothing and the like. Every year we go to the Raleigh Fair Grounds to look at what the RV world is doing. Most today come with solar systems and 12-volt refrigerators. On the GrandDesign forum, I see issues with 12-volt refrigerators...but no more than with our current gas/electric model. With grandkids, who at times join us on trips. I need to be able to sleep a couple, even if that means a nice air mattress on the floor that provides room to put one up. A major item to look at is the GVWR (on your tow vehicle door frame) rating. Sales will say you can tow X, but I had to take the customer otherwise. With my Reflection 260RD, I had to move from my diesel F250 Ford to an F350 dually long bed because the F250's GVWR was not rated to handle the weight. It could more than tow the weight but did not meet the rating provided by the vehicle manufacturer to ensure safety.
If you are traveling at 65 mph and have a tire blow on the tow vehicle, do you want to be able to maintain control of the tow vehicle or have the RV take control? Ensure you have the best-rated tires money can buy. Then there is the 3, 3, 3 rule. Rest every 3 hours, if not more, drive no more than 300 miles a day, and get to your new campsite by 3 PM. Enjoy safe travels. We have crossed the US three times and visited all national parks in the US including Alaska, and many in Canada.