Waterproof is a plus for sure but in my case it would be for commuting not travel. I have a set of Trax panniers and top box for that. I just don't need that much storage to go to work and I hate the way the bike looks with just the top box on.
However the easier way to go for the short term is to use one of my Rollie bags and call it good.
However the easier way to go for the short term is to use one of my Rollie bags and call it good.