Not sure about this, but can't you make two touring plans? I name mine Half day in AK or Full day at HS or whatever - can't you make two that have the group doing the same things for part of the time and other things selected as well?
That's what I would try to do.
We frequently do "Pick a Parent, Pick a Park" with our kids - for at least one day - on this day, the kids choose the parent and the park - and we have two touring plans. Usually we are in different parks, however.