It sounds like whatever dimensional stuff they use to travel is working right, at least - hopefully that means we'll be able to reach the Feywild, too.

I guess the only real thing to do is try, right? I don't know where you're at with resources or what incense and such actually costs around here, would trial and error be a big waste? Because if it were me, I'd just start with an amount that looks right for at home, and if that doesn't work get more next time until it does.