Jon,
The are really no restriction imposed by a PEG (unless you are a swimming instructor).

IMO, You probably have a better chance working through much of this is you get a PEG. Assuming no other complications (like intense nausea) the PEG can really simplify nutrition and hydration difficulties.

I don't think you will be able to work all the way through your treatment and the first recovery month, but you might make it through most of it.

I think TomoTherapy might make it a bit easier, but it still is really a roll of dice and individual response is an huge variable.

Letting you know, being a teacher, many of us lost our voice the last week of Treatment and for about a week after.

I have no idea why they plan to hospitalize you for a week. The only reason I was in the hospital was for surgery.