Hey, @Trikki2,
Don't do what I did once and forget my spray bottle, conditioner and head band! I had to get my daughter to race down with it. As Kmakm said, they will give you heated blankets, I ended up with two of them on and the heat packs on my arm with the infusion in as it stung a bit if I was too cold..
The ear phones may be a struggle yes. I just played games on my phone or watched movies, I found it was a bit difficult to do word puzzles or colour in etc. With all those blankets on things kept slipping off, even my lunch LOL. Don't order salad sandwiches, what a mess that made of their nice white cosy blankets hehehe. The chin strap on the cap does make it a bit difficult to eat so order something manageable.
I did my chemo in summer and was very pleased to walk out in 35 degrees afterwards but a beanie sounds like a good idea in this weather.
Just remember that awful cold feeling at the start shouldn't last too long. I used to distract myself by trying to remember all the words to "American Pie" by the time I got through that it was all good.
All the best. lovely.
xoxoxox