We have a DS8 who has reflux (well, he had the surgery so should I say he had reflux?) and he has a g0tube, now used for night-time top-up feeds. He has a mic-key, or "button" now.
It sounds like the others have provided good advice and oyu now have a few resources to call upon. Feel free to add me to your list. Remember the nursing stations in the park, they'll be happy to help. We stayed at the GF and they were also very accommodating. I wanted to avoid bringing a portable IV pole from which to hang the feed and they went so far as to send pictures of the beds, measurements of the posts on the headboards, the whole deal - I was able to hang the feed from the top of the headboard.
Don't be afraid of a g-tube. It made such a huge difference to our son. He gained weight (slowly still) but most importantly, he gained stamina and able to progress muich faster with his physio (he has cerebral palsy). It was a big adjustment for us as parents, but after a little while, we felt totally confortable. We are so glad we decided to go ahead.
Wishing you all the best,
Twinmum