Great pics, what route did you take through DV? Was there an event? Or just a lot of travelers?
I originally wanted to go: Big Pine -> Eureka Dunes -> Steele Pass -> Saline Valley -> Lippencott -> The Racetrack then out the southern end at Badwater.
But the timing didn't work out so I ended up setting up my first night at Stovepipe Wells. Then meeting the Brit, Aussie, South African, and the two Argentinian couples, I decided to make Stovepipe Wells my base camp and branching out from there. Then exiting the southern end at Badwater. Having international folks to chat around the fire was so worthwhile as we exchanged travel ideas, tips, and adventure stories.
As for all the international travelers in Death Valley the days I was there, I think it was just a coincidence.
I know there was an ExPo group there on the weekend, but unfortunately I didn't run into them.