Normally if you're playing open tunings you're going to be playing slide or chording with very little soloing.... So I recommend getting some larger string gauges to offset the lack of tension on the neck. Acoustic guitars are a lot more finnicky when it comes to warping. If you leave your neck sitting withough tension for a long time it will start to warp in the direction of the tension.... In the case of low string tension it will be pulled away causing backbow... Then when you do finally put the neck under string tension you run the risk of cracking the neck.... Grab some larger gauge strings to help keep the neck in a proper "Straight" position.....(Remember "Straight" means straight up the neck from the bridge to about the 7th fret... then a little relief, or bend, in the neck to compensate for string vibration...)....
I would recommend the same thing if you're planning on doing a lot of playing in drop C as well.... A larger string gauge will decrese string noise as well.