I too made it without the PEG. I hindsight I'm pleased with my decision but it was VERY difficult. I too had little margin to lose weight and did look scary thin. The plus was that my eating and swallowing ability came back quickly. My wife would say that it created more stress. As David said, my Docs all said that they could use the nasal tube if needed.
All the best,
Rob

6-05, Left Tonsil-T1N2bM0 stageIVA, chemo(Cisplatin), radiation(6660cGy), neck disection, no PEG. HPV negative. (Doc suspects posit)
3-9-09 last of 30 HBO treatments.