I have a hunch that some people will be there for the whole trip but many will be in and out. Those who have jobs may be there for the two weekend adventures but not for the middle ones. But that might actually add variety and interest to the experience for those who are there for the whole adventure and there's nothing wrong with that.
More people will probably chime with their thoughts when you define preliminary boundaries and campgrounds.
I do hope your mom continues to mend. Reaching 97 is a feat in itself!