Ha, I immeadietly though of a folding bike as well. HAM licenses aren't a bad idea either - those small ones are easily stashed in a purse or bag of some sort so you and your wife could communicate. You'd have to scope out reliability in the city canyons though. Got an Au Pair that is survival minded?
WARNING & DISCLAIMER:
SELECT AND USE OUTDOORS AND SURVIVAL EQUIPMENT, SUPPLIES AND TECHNIQUES AT YOUR OWN RISK. Information posted
on this forum is not reviewed for accuracy and may not be reliable, use at your own risk. Please
review the full WARNING & DISCLAIMER about information on this
site.