Oh you have quite a conundrum .. Five days is awful soon after your surgery. The meet probably wouldn't be an issue but, the ride there might be pretty uncomfortable. Not to mention, you have no guarantee of when you will be released from the hospital.? Just warn your daughter of the possibility that you might not be able to make it.. But you will do everything in your power to be there. Hugs Mama, I understand you will be in a tough spot.
As far as the liquid situation goes.. Get a thermos and bring ho****er.. Your new pouch may not be willing to accommodate cold beverages.. It took me about two months before I could! Lots of herbal tea
also you could add a chicken bullion cube to it if you were so inclined. We are all so different when it comes to recovery, you just never know. Good luck with everything!!