Short-term humidity control

[drurb]

I have to go out of town for 2-3 days so I won't be able to control the humidity in the "bass room" as I usually do. I figured I would leave the bass in the case when I am away. Now, I hate to use my damp-it (let's not even get into it). I figured I would place a damp sponge in an open zip-lock bag and place the bag in the case. Any thoughts?

[Jake deVilliers]

Sounds fine.
You'll be creating a very controlled mini-environment that has more chance of being wet than dry, which is just the thing.