Ken (KenKen) might be able to help you with this type of face-to-face contact. He recently confronted his brother at a family get-together. I suppose it makes a great deal of difference what you are looking for in the way of an outcome as to how you would respond to this situation. What kind of or level of relationship are you comfortable with here? Do you survive on or depend on any financial help from home, or might you have any occasion to ask for it in the future?
Ken wrote out a letter to his brother then ran it by all of us on the site first. Over time his letter was refined and eventually it reached a final product. In writing this kind of letter the thoughts of everyone who took part were explored and he became ready for most all outcomes. It may be that you are not as ready as Ken was or because of your age you might want or need a different outcome with less potential for rejection.
I would try to reach Ken and anyone else with experience with this type of confrontation. In my own case, I was estranged from my parents and siblings for 20 or more years before I recovered a decent relationship through and working beyond my therapy. What are you looking to accomplish with this visit? Do you want to try to slip in under their radar and slink around avoiding the subject and any consequences, or do you want to mount a full-scale night incidiery raid in an attempt to do the most damage?
What you want to accomplish is critical in answering this question.
"We stay here, we die here. We've got to keep moving". Trucker Mark