I’m glad that you’ve found surgeons who will help you! I was prescribed codeine after my surgery, but didn’t need it, maybe they’ll give you that if you need something stronger… Here’s a link to a surgery shopping list one of our members put together in case there’s anything you’ve not thought of:
Surgery shopping list - General - Living with Eagle
It sounds like a good idea to have an extra couple of nights in a hotel before you travel back home, in case you do have trouble opening your mouth wide, maybe get some ready made smoothies as you won’t be able to prepare anything? Or pots of mousse, jelly etc, whatever you think you might like?
I hope that your surgery is successful & will be praying for you 
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