David,
I am currently at MD Anderson Cancer Center for my 2 year scans and exams following treatment for stage 4 squamous cell carcinoma in my throat and neck. Hodgkins is not a walk in the park, but your odds are a whole lot better than mine, and I am still alive and "cancer free" (unless my doctor tells me differently tomorrow) after my treatment. I hate that you have to go through everything that lies ahead of you, but you can and probably will beat the cancer if you go at it aggressively. I'm not sure you will feel like shooting for awhile after you get into your treatment. I was in bed most of the time for half a year, but I don't think your treatment will be nearly as bad. My wife's grandmother was 95 when she was treated for stage 4 Hodgkins and now she is 102, cancer free, and going strong. Best wishes and God bless you.
Allan