[Zeke]

The only thing I can tell you since I don't fly anymore is get up, go back to the bathroom and do some quick stretches before you cause a lot of attention. At least every couple hours. Unless you are a known snorer I'd take something to sleep. You may find that at some point the plane cabin is fairly quiet. And I hope your seat isn't in the cattle section. Kia should be better to you.

The time change will mess with you. You can prepare by altering your day schedule, but that can be difficult under some circumstances. I don't evny you. I would have opted out.