I've got them all packed in boxes with newspaper right now, will wash all of them when I get them to dd's and separate each plate with a paper towel or two. It's transporting the clean plates to the venue and then back out again that I haven't figured out.
We thought about plastic sink-size tubs, but those aren't very sturdy for carrying china, especially if we have to carry it two blocks. I have even thought of buying a child's wagon or garden wagon when we get to dd's and then leaving it with them.
The road to success is always under construction.