Is this a foot or vehicle contingency plan?

Seriously consider the reality of quick bug-out with the wheelchair-bound. IMHO, an option is to have the family leave as soon as it seems like something is coming down the pike. You stay as the "home guard" until it is absolutely necessary to leave.

Don't forget that you can use the baby stroller as a "pack mule"/handcart.

All others feel free to chime in....

My 2 cents