From watching the PLL, it seems at first that CWLS will not work with DC Travel, but in a later patch, they'll have it to where you can join CWLS of another data centre.

However, that being said, it does seem like they will only work when you're in that DC.

IE: I'm on Primal, and while visiting friends on Crystal, I get an invite to a Hunt CWLS. While I'm on Primal, I won't be able to interact with it, but it will still be in my list, but when I return to visit Crystal, I can freely use it.