We are headed back in February and my mom isn't 100% sure if she can go and work out of the hotel. I made them for 3 people, but if only two go, will be charged in some way?
No, but you may want to call and remove her if you have a prepaid reservation for CRT or a dinner show.
At restaurants that have a credit card hold, there is no penalty for a partial party showing up. The no-show fee kicks in only if the entire party doesn't show up.