On our last campout we tried rehydrating a 2-person meal in one bag and then sharing. Then we divided the dry ingredients into 2 separate freezer bags and rehydrating that way. The boys seemed to like the second way better. Each boy took enough freezer bags to have one per meal with a couple extras "just in case." It's fairly easy to divide by holding both empty freezer bags together and pouring dry ingredients into each a little at a time. Since you can see how much each bag has in it, it's easy to tell when they have equal amounts.
On the meals we got from Philmont, most only had one entree that needed rehydrating. One of the meals also had an apple cobbler dessert that needed rehydrating. We did that one in fewer bags and all ate out of it (we were tired). However, if you have an entree with a side of peas, corn, or something else, you can always mix the dry ingredients together like a stew and rehydrate in one turkey bag. It may not be great, but it's easier.
Even cooking in turkey bags, I would still use the Reactor with 2.5l pot and the Helios with 2 or 3 liter pot. After you boil water to rehydrate, then boil some more to clean with while the food is rehydrating.
I hope this helps.