The first answer pertained to if you want to do a split stay without
free dining. You would book a package with room + length of stay park tickets to cover her entire stay at both resorts, for Pop, then book a room- only reservation at POR. She would have to use her KTTW card from Pop for park admission for entire stay. I have heard that sometimes the tickets can be pulled off and put on another KTTW card, but not sure. It can be glitchy.
If you want free dining at both resorts it's a whole different ball of wax, and not cost effective because each stay(reservation) requires booking with a minimum 2 day park tickets. Different rules for free dining.
Hope this makes sense.