Bonnie,
Since there is lymph node involvement, the radiation will usually target at both sides of the neck to play safe. I had treatment in November too and when it was Christmas time, I was staying in hospital already because I had high fever and very low white blood cell count. I had dropped almost 16 lbs and the doctor had to observe me more closely to avoid further complications. I think your daughter's situation should be less severe than mine as she doesn't have concurrent chemo treatment. Moreover, she could have enough nutrition through the feeding tube. I won't describe any period of treatment as 'honeymoon' but I agree that the side-effects for the first 2 weeks of radiation should be minimal and then as effects accumulate, the patient will feel rather sick, physically and mentally. As reflected by members here, IMRT can save the salivary glands and therefore mouth dryness should be bearable. There may be a change of taste for some time but people can have most of the normal taste back in a year or two. For me, the sweet taste is still far away from me but for others, it is pretty normal. Of course everyone heals at different times and reacts differently to treatments. Don't worry and be strong.
Karen