I can understand just how you feel - I also feel guilty about issues like this. When I look back, I realise that my mum and dad were quite unreasonable in expecting us to have them to stay every Easter, Christmas, etc., etc. With two children and both working hard, we had very little time - other than these holidays - to ourselves to relax. After dad died, mum came with my husband and I abroad on holiday every year - and we were still working and it was our only holiday. This caused much resentment from my husband, particularly as mum, though then sprightly, was unwilling to walk and didn't like being left to sit somewhere while we went for a walk.
She is 93 now and the last couple of years she has not come on holiday with us. This is partly due to the difficulty of getting insurance and partly due to the fact that we have holidayed with our son and his partner and their two young children, which Mum would find tiring. She questions me about what we are doing for a holiday this year but, now that her mobility and eyesight are poorer, it would be too stressful to take her abroad with us. Last year I went with her on a short coach break at a Warners Hotel. She didn't seem to get that much enjoyment from it and I found it very stressful, but she wants to go again this year and we will probably do so.
It would definitely not be a good idea to take your mum with you to Disneyworld at Christmas. It is not the sort of environment that most elderly people would enjoy, and, if she's anything like my mum, she would resent being left in a hotel on her own.
Everybody is different and their choice of holiday reflects those differences. I don't particularly fancy going on a cruise but many people love them, ditto skiing holidays.