I would only be concerned with dampness if this was outdoors.
A cabana should not be any wetter than a bathroom in the house.
These days, if you have an outdoor GFCI, I would use a dead front under a snap cover and use separate WR receptacles under the in use covers. Personally I only use "in use" covers in places that will have cords plugged in unattended at my house and "come and get me copper" but my house is old enough that I could say it was existing when the universal in use cover rule was imposed.
I do still have the in use cover on the new outdoor receptacle I put in with my addition but it is under cover and doesn't really get that wet.
