M.D.
I moved around a lot as a child and I don't remember ever having issue with it. A few years ago we bought a house in a different state than we were living in and this was a first move/big move for my kids age 4yrs and 2yrs at the time. I just talked about the move with them in language they easily understood and we talked about the move almost every day. I prepared for the kids a photo album (that they never needed) that could help the transition if we had issues. Take pictures of common things, like his bedroom (as he is familiar with it decorated), your bedroom, the hall leading to your bedroom, the front of the house, all the room almost like a virtual floor plan. Also take pictures of his school and familiar places or things that he likes that he won't see anymore. That way if he has issues in the new place he has visual comfort of what was familiar. Prepare a move bag of things he can not have until moving day (games, snacks, cuddle item, etc.) and do what your mom did and make it an adventure. If you and your DH are excited he will be too. Just make sure the "special" items go with you in your vehicle so that they don't get lost.