Advice! Controlling parents 😡

So this summer I want to take my son on a trip to another province to see all of my old friends and some family. However I still live at home and my parents (mom especially) are extremely controlling and over bearing and I know they won't approve of me going on this trip. But I would like to go back before I get a full time job (I just finished college) and won't be able to for a long time. I haven't been back in two years and no one has met my son. I really really want to go but I know I'm going to get a lot of back lash from my parents and it will end up starting a fight with them. I'm 22 and they treat me like I'm 10 and try to control everything I do. Any advice on what to do or how to deal with them? Yes I know I'm an adult and can do what I want but it's a lot easier said than done and I hate having to deal with them but this trip means a lot to me. TIA