In article ,
says...
I will be traveling 250 miles the day before and I may not have access
to refrigeration. Any thoughts?

Yip, que Randall. I was waiting for that.

1. Don't do it.

An option. Leaves the couple with snaps taken with disposable plastic
cameras scattered around. Do you really think that's a better result
than what an interested and alert amateur can produce with a good 35mm?

2. Use medium format.

Not an option. They don't have the money to pay for that. Sometimes
people just can't afford your snobbery.

Marc