I still think that if I had to do something like run ahead of a disaster, I would take at least 4 5-gallon buckets with lids filled with sawdust and one empty one, to use as toilets. Those clip-on camping toilet seats made for standard 5-gal buckets are great.

Put a couple of inches of sawdust in the bottom of the empty bucket and clip on the toilet seat, add some sawdust after most deposits. When full, remove toilet seat, attach lid. Repeat.

This would be esp good if you have a woman and kids on board. Girls can't just step behind a tree and look for Indians, you know. On I-5 here in the Pacific Northwest, the rest areas are 40+ miles apart, if they're all open.

Sue