One time I was restricted to my luggage size. I used a large suitcase and put a large mat in it rolling it around other things. Got just about everything in that 1 piece of luggage + sewing machine.
Sure like Jan in VA's idea for mat folder. Multiple uses is very necessary when traveling. Using clips to hold it closed would allow for a larger design board when opened up.
I'm going to a retreat soon and think a flannel back tablecloth attached to the wall with Command Strips might solve the design wall delimma.