AITA for asking if I can take my family somewhere else before my boyfriend does the LSD?

My dad passed away on February 15th 2023. His will says that we all have to go on vacation in his state together for a month before we can see the rest of it. The vacation is March 1-29. My boyfriend has to work in the state my dad lived on during the month of March so he usually books an airbnb for the whole month because it is easier and less expensive. He won't give the address until he's there and knows he has everything he needs. He is now telling me that his work requests will be more on the side of the state where my dad lived than they were in the past so he thinks it would be easier if me and my family fly out the day before my dad left the state and go to the side of the state his work will be in so that he can go with us to the airport and I can give him the keys to my house which will be locked the whole time I am gone. I think this is too much and told him I can just mail him the keys and he can drive to the airport. I also told him that we need to have the address of the airbnb we will be staying in beforehand because my family is going to be stressed enough with the vacation as is and I don't want to add to it. He agreed but said that he needed to be certain that he could get into the house. So I said that I would leave a key outside so he doesn't have to wait for me to mail it. I made the key and texted the code to the lockbox. I told him that I will give him the address for the airbnb after I buy the tickets since he won't give the address for his place until he is there and knows he has everything he needs. He got mad and said that I shouldn't be trying to make him do what I want when I am the one who needs him. I said that we would just stay at a hotel and give him address for the tickets and hotel and he can pay me back for my family and myself. He said that this was supposed to be a convenient thing for both of us and that he needs us to break up the drive for him to take his medicine. I don't understand what he is saying but he just started asking about how long I would need to break up the drive. I've never heard of this and asked what he meant. He said that he will be driving for the whole month and sometimes it will be 5 hour drives and he can't do that without the medicine and he needs to take the medicine at certain times because he has to be off of it before he starts driving. I have no idea why he would need to drive so much but I assumed it is for his job. I asked if my dad's vacation could conflict with his job and asked if he could be off the medicine for a month. His tone was getting firmer and he said that he can't take the medicine on a long drive because it has too many side effects. I asked if he could just take a different medicine and he said that it's not that simple and that he could lose his whole career. He told me to look it up so I did. It turns out that there is no medicine. He is talking about lsd. He has lsd deficiency. I assumed that meant that he couldn't have lsd but when I looked it up that isn't true. It just means that he needs to take it sometimes because he doesn't feel well without it. It said that he takes it because it helps him feel better but it has side effects that are bad for driving so he can't drive for a few hours after taking it. I asked if taking it made him feel bad and he just said yes. I said that we will be driving down and that my brother and his family and my sister and her husband will be driving down too so we would need 4 places to take the medicine before he started driving because we won't all fit in our cars and he will be driving us. I asked if we would need to drive to all of his work requests or if the only requests he will have are at his airbnb. He got mad at me and said that I shouldn't be asking him so many questions about his medicine and that everything he is telling me is more than he has ever told anyone else. I know it is a lot to ask but I assumed he would want to take the medicine on the way to the airport since he won't know when his next chance will be. He said that he already knows when it will be and he can do it without me so I can just mail him the tickets for my family and myself.