Kyle, I luckily was spared the chemo ordeal but I did do 6 weeks of IMRT, preceded a month earlier by a radical neck dissection. I elected not to get a PEG and now, months later, regret it. At the time it seemed like a good decision, especially as I had a crisis during my neck surgery and almost didn't wake up, necessitating an emergency tracheotomy. So I was a little gunshy about another operation.
But the second half of RT and the two months or so following were such an ordeal - mouth and throat full of sores, swallowing disfunction, etc. - that in retrospect the PEG would've made life a lot easier. And maybe helped me keep on some of the 30 pounds I lost.
If you have a choice, I'd advise going with the PEG.
Good luck to you both!
David 2