We've moved this topic to the Practical travel issues section of TS/S as there is much useful info to be gleened from it.

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essxjay
TS/S moderator

if you can convince your mother to use the wheelchair
 

that was the single most helpful hint we got when we moved my mom from LA to Las vegas.Short domestic trip, I know but it helped w/security and everything else.

the advice re adult diapers is a good tip as well.

Good luck to you on what seems like a sad situation that you are dealing with with grace and intelligence.