One thing to take into account is that almost all of the published adventure material was written for v1.0. Most of the plot points are still usable but you'll need to adapt any equipment or NPC stats. The community here can help with specifics.
It sounds like you want to run a classic "start in Europe, get home to the World" campaign. This sets you up for
several of the original modules:
- Free City of Krakow introduces a large independent survivor community and focuses on espionage in the ruins.
- The Black Madonna gets into Polish history and has something of a "dungeon crawl" feel to it.
- Pirates of the Vistula is a travel and escort story which leads into...
- Ruins of Warsaw is a military aid and training operation aimed at eliminating a ruthless regional warlord.
- Going Home is a road trip with a time limit, which leads into a return Stateside.
I do feel compelled to ask, though: what sort of adventures do your players want and where do they want the campaign to go?
- C.