Hi Zachary,
A few of my experiences...
The ability to eat normal food went pretty fast. It wasn't just a loss of taste - most foods were just plain repulsive. I eventually found I could eat 3 identical meals a day: egg and cheese omelets (with cut up ham inside), with a little tea (and honey) and 2 Boost Plus (about 2700 calories per day, if I recall correctly).
My throat slowly got worse and worse, so I took a codeine-tylenol mixture, and used magic mouthwash just before eating to help get my meal down.
Water and gargling with a salt/baking soda mix were very helpful for general maintenance of hydration and to help control mouth sores. I got thrush a couple of times and took antibiotics for that. I got canker sores, and used an over-the-counter medicine for that. I got pimpes very badly from Erbitux, and took antibiotices and steroids for that. I ended up getting very constipated, and nothing really helped much so I just did enemas at the end. I took nausea medicine - the first one I tried didn't work very good, but the next one (Zofran) was quite good.
I did weekly chemo with Erbitux and Cisplatin - on Wednesdays. So I felt fairly bad by Friday, but nothing horrific.
I also took daily Ethyol shots - rotating arms daily. I had no big problems (the Zofran helped, I think) with it, although my RO advised it would be the first thing to go if I started having trouble.
I exercised daily - light weights and some easy cycling, as well as walks with my wife (who did a great job as my caregiver). I did neck stretches daily (I had a modified radical neck dissection), which I still do three years post treatment. I did and still do daily mouth opening stretches, since trismus is possible due to radiation therapy.
I did not have a PEG, so my RO monitored my weight very closely, advising I would get a PEG if I started losing weight. I lost maybe 5-10 lbs.
My advise: find simple foods that are palatable and have lots of calories in small amounts (since it's not the most pleasant experience to eat); deal with every ache and pain by getting a medicine, and if the first one you get doesn't work then get something else until you find what works - don't let pain or nausea linger; keep active as much as possible; get a caregiver if possible, who will look out for you (sometimes we are are our own worst enemies when it comes to asking for help); keep your mouth as healthy as possible (you should be getting flouride trays or a flouride regimin); stay hydrated.
For me, it was very unpleasant but not horrific. Hopefully your experience will be similar.
So, here I am three years later - I'm in great shape, I feel great, I eat well, I have pretty good saliva (swallowing can be a little difficult). I will be doing flouride trays twice per day for life and I now take thyroxin since my thyroid has slowly faded. Neither of these is all that difficult.
Best wishes,
Chris