I suggest looking at it in a different way. If you already have a travel agent that you know and trust use them ,otherwise look round. Here Hays have a good name. Firstly make a list , of your needs,from help getting to an airport, to help within and outside the hotel including as other have said ability of someone (male) to deal with toilet needs. So you could decide that you need a male assistant to help you once you arrive there , who could both drive a hire car, deal with y our fathers needs and provide you will local support. Or you could decide that you need to look at people who deal with taking disabled visitors away. Then you present this to the trusted travel agent and see what they have to say before you even tell your father. They will be both helpful and be aware of things you might not have thought of. Then you must be in charge, so you chose the time of the trip, so practically I would think that either late spring or early autumn would mean less people easier moving about etc.Once you have all the information at your finger tips then price the trip up at the most expensive end, so you might say you need another person with you for the whole trip and that will mean the cost of the flight and rooms etc for them for the whole trip. See what the cost would be at an expensive time of year. Then work out with the travel agent what would actually be the better time to go and the cost. Only then speak to your father and give him an ultimatum. That you are prepared to take him on the condition y ou go in this way and stay at this place etc and it will cost ---, and show him a typed breakdown of costs on the travel agents notepaper. After he has exploded about the cost etc then state that in that case you will not go. Refuse to talk about it again for some days. Then go back and say that , with a lot of effort you have found a way to do it a bit cheaper and put forward the arrangements you wanted in the first place!! He SHOULD be grateful for your efforts and choose the latter option. If he refuses or says he only wants things x or y way, you say that you have spent quite enough of your precious time trying to suit him and sort out something. That if he thinks your ideas are not good enough he is welcome to work something out for himself and then say you are not going to talk about it again until he either agrees to your way or provides another option that you are prepared to listen to!! He can still make his choice as to how and what he may do. The difference is that you also show that whilst you are willing to help out - even though he does not deserve it with his attitude - then stick to your own rules and DONT let him wangle round you to do his bidding. This way you both have choices to make, but you have made it clear that whilst you will help where you can as his daughter you are not going to be bullied by him and his mean attitude. I would also tell him that you expect him to pay for YOUR tickets and costs as it is for his benefit that yo are going not yours. Then he has the choice to make. If he says NO , that is fine, you have done your best made a lot of effort and if he dies before going there , you know it is his own fault. If he decides to go with someone other than yourself great. Make sure that you go away at the same time as he goes away with whoever so that you are not at the end of a phone if he gets in a mess!! If you are a mean and selfish person being older doesnt mean you change to be any better. There is a difference between needing to give extra help in such things as getting up and down or into a car but no excuse for being badly behaved. If you let him dominate you or make you feel guilty due to this trip , he will only carry on in the same selfish and horrible way in the future. When you have offered the above you have done more than you need to . Dont let him take over your life. If he refuses to do anything you offer, arrange to go away and if he then demands that you cancel and take him somewhere state politely that as he chose not to use any of your suggestions you have now made other plans and are not available at that time. Also you could tell him that as you have been to a lot of trouble to do all this and it has been thrown in your face that you decline to make any further plans in the future and will let him make his own choices as you will do for yourself. Good luck, tell your sister what you are doing, write yourself a note to look at to remind you why and what you are doing and let us know how things go!!!