We've moved across the country a handful of times. 80 miles seems do-able to me! :)
Use boxes from liquor stores. They are super durable, small enough to carry, and are FREE! They don't tear them down, so you don't have to put them back together. They were perfect for dishes, books, odds/ends, etc. Not so great for large/bulky toys.
Pear down and get rid of anything you don't want to move 3 times or more.
When you get to the new place, label your kitchen cabinets with masking tape of where you want everything. This becomes a great job for someone to help you when you get there.....they aren't going through your personals, and you need your kitchen ASAP. LABEL YOUR SILVERWARE!!!
Have an idea of where you want your furniture when you get there. So you are not holding up the show trying to decide.
Set-up your beds immediately when you get there. Keep clean linens for beds, towels, etc. packed separately in your car. Pack you, hubs, and your kids like you are going to a hotel, keep that separate in the car.
I only bought a roll of plastic wrap ($10 at Walmart), and a roll of bubble wrap. I used free boxes (also look on CL or Freecycle), and newspaper.
For the packing, designate a place in your house or garage (be careful of things that melt in the heat!) and start putting your packed boxes there....away from the kiddos.
Ask for lots of help to pack the truck, but be READY with everything packed. Feed and water your help often, and thank them profusely!