Hit several points in one post:
1. Kids and tech: We turned off TV one summer and played board games, swam, etc. and it was a great summer. Events have overtaken us on the last couple summers but its doable. And my teens love camping and we mostly travel by sit and sit by the fire at night. Wifi and cell signals are so bad in campgrounds we got used to not having it for more than a cursery check.
2. I agree you don't have to jump to 5er or RV. We started with a cheap, used pop-up which we still have. Probably relates to #1 - we stay outside until we sleep because it's cramped but the campfire is part of the process. Stinks in the rain though - which brings me to #3.
3. Fellow military here (Navy). We've enjoyed the heck out of two cross country PCS's in our popup. Rain is a pain and you can't plan around it like you can on a weekend trip but otherwise it's been amazing family memories. I'm considering bumping up to a Class C because we like traveling and the motorhome is much more user friendly on the road (although a PUP tows well.) The big risk is getting stationed overseas. I will buy used regardless but I definitely have to keep resell in mind in case I get overseas orders. I've checked the Japan box so it's not likely but they are called orders for a reason so you have to take that into account.
4. My vote on motorhome vs 5er is you have or would use a 3/4 or 1 ton truck outside camping. I have no use for a 3/4 ton truck until I retire from the military and get a boat. I will probably downsize from my F-150 and go the Class C route.
5. Go to an RV show and enjoy the day. We spent nearly a full Saturday at one a few weeks ago and just walked floor plans from travel trailers that I can pull with F-150 to Class C's for current research as well as Class A's and 5th wheels dreaming for the retirement option. Kids had a blast. Keep in mind they will like the most expensive option. Good time to discuss budgets. We're hopefully going to the Pensylvania show this fall if my schedule works.
Have fun!
2008 Rockwood Signature Ultralite 5th Wheel
F-250 6.2 Gasser
Former PUP camper (Rockwood Popup Freedom 1980)