Hey Mark,
Dropped into Madison Music when I was having a guitar worked on a few doors down at Lane's Lutherie (Lane has moved to a larger location a few miles to the east now). They have a few walls of mighty fine looking guitars.
The humidifier that I use is the Planet Waves one that fits in the sound hole. It works good. In really dry weather, the sponge can dry out rather quickly, so I made a guitar case humidifier for each of my guitars to compliment them and increase the amount of time between maintenance. It was really easy and only cost about $1.50 (US) for each humidifier. I don't know if I showed this stuff to you when you where at the Green Lake jam session . . . . . here's what I did. I went to Wally-World and bought eight or ten of those travel cases ($.97 each) for a bar of soap and drilled a pattern of holes in the top. Then I bought a bulk bag of sponges ($2.00 for a bag that took care of all the cases) at one of those Dollar stores that are everywhere now and cut a sponge to fit within the case. Fill the sponge with water and squeeze out until just damp, put in the soap case, throw in the guitar case, and voila! Here are some photos for you:
Home made humidifier on left - Planet Waves humidifier on right
The guts spilling out of the humidifiers . . . . . MooooHaHAHAHA (mad scientist laugh)
Planet Waves humidifier in sound hole
My home-made one fits nicely in this case at the heel of the neck:
Home-made humidifier in case
Home-made humidifier in case
The top of the soap case is convex, so the sponge will not be up against your guitar or anything fuzzy in the guitar case. It's really important that you wring out the water so it doesn't drip out of the sponges and onto the guitar . . . . not good. Also, I found that different guitar cases required more checking due to the composition of the material and how tightly it is sealed. I would guess that it's about a week-and-a-half to two weeks between check-ups. These keep my guitars happy at about 47% humidity or more during the cold, dry winter months. I would also highly recommend a hygrometerto put in your case to keep an eye on things, at least until you get the hang of it. You can usually pick up a good digital one on-line fom Amazon for under $25.00 that will fit somewhere. I put mine in the "case candy" compartment. You may even want to keep an eye on it in the summer if you tend to be overly ecessive with your airconditioning. Just a thought.
I know you're going to have that new instrument and enjoy it for a long time.
Hydroman52