Hi J.,
I moved once when my sons were 5 and 18 months. Here's what worked for me...
First, I solicited help in packing, hauling, stuff like that. Since I teach high school and the school required community service, I got lots of students to help. Perhaps your church/synagogue/mosque has a youth group that would be willing to pitch in? One day, I had all the girls over and we packed up books, closets, and the kitchen. The next day, I had the boys over and they helped move all the furniture.
As I packed each box, I used colored stickers to identify which room the box belonged in. That helped sorting the boxes after the move much easier.
Second, I had a family friend (daughter of a fellow teacher) join us for our move (it was a two day drive to the new home). This was someone my sons knew well and her primary role was to be the nanny while I unpacked at the new house. She spent a week with us and, although I didn't finish unpacking in that time, I got the bulk of it done with minimal distractions and great company.
While my older son was sad to be leaving the only home he'd ever known, everyone at preschool, etc., we played up what a big adventure this was going to be and all the new friends he'd make in his new school. Since our attitude was upbeat and positive, so was his. I would acknowledge his concerns but redirect his comments to the positives (new friends, new school, new playgrounds). Each day for the week we had our nanny, we'd go do something new and fun. It was a great way to explore our new little town!
Perhaps most important of all, use this as an opportunity to ruthlessly get rid of stuff you don't use anymore. If you haven't used it in the last 6-12 months, give it to charity. I told my student volunteers that if they saw something they liked, something I was giving away, it was theirs. The boys had a field day with the yard equipment and the girls loved the party dresses. I didn't do this well enough and I'm now on my second home in my new state and I'm still moving some of the same boxes! Foolishness!
I hope this helps. Good luck in your new home!