I don't like going away at all! Its so stressful trying to organise even a long weekend away, I have to sort out animal sitters, someone to look after my disabled mum, pack for 2 adults and 4 kids etc etc. Then when we went to spain, day 1 we get a phonecall saying "vets coming in, the milkers not well at all....!" aaaaaaagh huge stress, not a lot I can do from Spain!!
we are going to a travellers/hippy camp in August with the trailer, tony will play music and I will sell crystals and maybe some soap
its only about 15 miles away so I can drive home to milk the goats and if we want to stay all 3 nights we will, if not we'll come home after one. Its totally off grid so cooking will be on a campfire in a skillet/pot, no tv, no internet - bliss!!
I can see why you don't want to upset your grandchildren, they didn't make the plans an dthey will be looking forward to spending holiday time with you. I was the same that age. Maybe its a life lesson that all holidays need to be liaised about and hopefully your family will do that next year