Daisymae - I'm sorry for your predicament, and I do understand what it's like to push a wheelchair on gravel, rough ground and sand - I took my disabled mother three times a year to our holiday home in southern Europe until she was 90 and it got too much, but two things were different from your situation - I had my much older husband who helped but not massively, and I understood that the plane trip was too much for my mother as she was confused with that part of the journey. You don't mention your DH's thoughts about the holiday - have you asked his opinion? He might be going along with the holiday plans believing he's helping you so maybe you should involve him, let him know you end up exhausted. One suggestion that's already been made is to get all your meals delivered, and if you do your research you might get an air bnb close to a breakfast/brunch diner. As another thought, could you take someone else with you who could help. Yes these things will cost money, but in the last three years of travelling with my mother it was worth it to pay for the flights and meals of an elderly relative who was fit enough to help and also happy to keep my mother company so that we could go out and this might be something that would allow you to go on a peaceful walk with your dog by yourself. My advice is that if you absolutely don't feel you can continue then don't but if there's the slightest chance you can keep this bit of your normal life going, try your best.