I am so excited for you! What an experience. Have you travelled long-haul before? It certainly messes with you. I have done many long-hauls and found benzo's to be crucial in keeping me stable (well stable enough) although my flights have been over 20+ hours (up to 45 hours once due to a delay in Chicago). I tend to go up then crash, even get depressed but we're all different. Either way I hope you manage to stay stable on your trip. Have fun!