Live in condo w/ dog and girlfriend (hmm, I wonder why that order).
Lots of open space behind our house - catholes if needed.  But also have some 5-gal buckets and a ton of the small 33-gal bags.  So I could do the ole camping toilet trick.
Worse case scenario, I live about 1 mile from the bay.  I could spend lots of time "checking the props."  Along with, likely, half a million others (eeewwwwwww).
I'd worry more about it in a short term situation like the Chunnel event a few days ago.