I can't speak for others, but I hate going on trips with the boy. It's easier now that he's almost 8 and fiercely independent. Still, I've done that direct flight to Frankfurt and, with a baby, it sounds like a nightmare. Every trip I have ever taken with the boy/his brother has resulted in my needing recovery time. The last time, Hawaii, we were there for a week, my family was mostly awful, except for my sister and mother, and I spent a month feeling shaky and freaked out. I would have done a lot better if I hadn't had to worry about wrangling a 5 year old, and if I had had some weed. Trips without weed are the worst. Then again, my stress-response is generally fucked.
Actually, I am supposed to go to Germany this summer and am dreading the lack of weed. They have it there, sure, but I don't really have any sources. Except for my cousin S. who just got busted by his own brother, my good-for-nothing spoiled-ass other cousin O. for petty bullshit. Now S. can't get any of the very lucrative jobs he qualified for, forever.
Sorry you're having a rough go, ECH.