This is doable in terms of offerings, wait times for food, etc. The only thing to question is if you’d be able to physically eat it all
You can knock out 1 entree in the pre-park close portion.
Grabbing snacks is easy as you go - churros, pretzels, etc.
Butterbeer was also easily accessible and we grabbed sodas, powerade, monsters, etc throughout the night as well.
I also had a backpack and brought some ziploc bags so that I could save half a churro or the cinnabon bites, etc and have them for breakfast which was a big help. My sister grabbed 3 Monsters on her way out of the park as well