Congrats on the house sale and yes......cash sale? Must be REALLY nice!!
Put what you want/need in your car. That way, you are assured that it doesn't get "lost" in amongst all the other boxes you will have.
I don't have the luxury of doing something like that. Everything I own will go into boxes, then into crates and then on a ship cross the giant pond and then onto a truck to my new place, where ever that may be. But, I digress.....
Make sure you mark ALL your boxes of fabric/sewing items. I pack my sewing room up myself. I have to leave the boxes untaped, then the packers will tape them up and mark that they were the ones that packed it. (All has to do with insurance purposes and such.)
Good luck in your move!!