G`day mate
We have an Adeventureline , not quite a back pack but has a 4 piece setting (can get six) wine glasses cheese cutting board, table cloth, salt and pepper shakers and heaps of storage for thermos, mugs and food. Had it for years lives on back seat when traveling great bit of kit. We also have a wicker one which again is years old and has had a hard time, I do prefer it to the soft body one as it is easier to use, but it is slowly falling apart.
Beers and Cheers DCP