Good luck, Eric,
surely they'll let you bring a cd-player, I don't see why not. I spent my 10-15 min. radiation periods reciting poems and songs in my head, but an hour - I would go with medication and hope to sleep through it. I never suffered from the mucus hardly at all until after the radiation was over, I hope it'll be the same for you.
Sometimes I would lie there trying to visualize the cancer cells being bombarded by the rays, but that never worked too well. You know, going "Kill, kill, kill", in my mind.
I hope they get them this time.
Leena