Hi Mel,
Before I answer, just need to re-iterate that I have no knowledge of your husbands problem, being so different to mine. So please interpret my input as "generalist" in nature.
The radiation I had is, by decree of most practitioners, just about the worst you can have in terms of side-effects. I found no problem with the administration of the treatment itself, which some can find difficult because of being held in position.
My side-effects were predominantly a mouth full of ulcers, and throat soreness, the pain from which was extreme at times. However, the oral tissue is a mucous membrane, and behaves (I imagine) very differently to the skull and brain.
Follow the directions of the clinicians, especially the post-treatment care for the skin which MAY be specified by the radiotherapy nursing staff. This will be of great benefit, if relevant to your husband's case.
There is a wealth of literature and resources available form the Cancer Council and others, in relation to kids and cancer treatment of their family. My girl figured out that I had cancer, so avoiding the "C word" became moot. We simply told her that I was going to be unwell during treatment, and that the treatment would get rid of the cancer. Again, a different situation, because I had surgery which really DID get rid of the cancer, and the radio / chemo was to nail the lid shut. There was no point or need to examine the prospect of a recurrence down the track.
My advice to you is to take professional advice from the resources available - GP, cancer council, hospital, etc. DON'T GOOGLE!!!!
If you have not already done so, I strongly advise referral to a psychologist for counselling for yourself, and you can seek advice on the kids from them. Your GP can provide a Medicare referral for at least 6 consults, if not more, which will give you $122 back on each session. Get it, and use it.
I'll back off for now, let you absorb my rantings above, and allow you to formulate further questions if needed.
Remember, as far as cancer generally goes, people DO survive. I'm living proof.
Regards,
Mark.