That’s easy. I won’t.
I also suspect this will all change
It will come down to, if they require it, are people willing to put up with the discomfort to be on their vacations? Personally I'd gladly wear one in the parks, because we tend to spend a lot of time in the resort and just pop into the parks throughout the day, but on a cruise ... it wouldn't be worth it to me.
I suspect as the pandemic dies down, airlines will no longer require masks. (And really, no one is flying right now anyway.)
As for me, NO, I go on vacations to have fun. I find masks hot and uncomfortable. So, NO, I won't go on a vacation where a mask is required.