I agree, it's likely that a good portion of the crews would be dead. But there would still be enough people to work together. Especially since the UED ship would have SCV's, which would help a lot. For how they got there, I was imagining that each ship had some sort of FTL-related mishap (for example, I was thinking of having the UED ship enter an emergency FTL jump with no coordinates to escape from some Dominion ships that were chasing them). The crews and the locals could have all sorts of interactions, too. I'd imagine Twilight would love to check out all the fancy new technology.