Apparition, sounds to me like you're in my situation. I do have some advice to give you though, and here it is:
1) I really don't think that it's a big deal to take a month off if you commit to volunteering in the hospital. As for indicating that on your application, you'll have to ask somebody else...I'm not in the application phase yet, sorry! It's mainly to gain clinical exposure, and if you like volunteering in other areas I would say commit to those areas! 🙂
2) I think that volunteering in the hospital isn't all that great for most people, since all we lowly volunteers do is stock shelves, make beds, move patients and clean them up, etc. I think that I must have had it worse than you...have you ever had to clean up after bowel movements? I had to clean up several after a diarhea (sp?) patient well did his thing 😀
I don't see the relevence to medicine, other than exposure to what the medical environment appears to be (nurses, patients, etc.) and I can't really relate my current experiences to what I'll be doing as a full-fledged physician, since I'll be treating patients' illnesses, not stocking up the supply room. Don't worry about the experience making you a worse doctor overall...I sure don't, since it isn't relevant to what I'll be doin' in the future, and I sure don't think that it'll be all that relevant to what you'll be doin' in the future, either.
Besides, I never planned on being a hospitalist anyway. I am actually starting to like outpatient more. The hospital's very depressing for me. But that's going off-topic here...
Here's my advice for making the most out of your experience: during your breaks (or down time due to a slow shift) take the time to be assertive and aggressive regarding getting your information on the profession. I mean, if you are done making beds and find yourself with nothing to do and notice a nurse or doctor that you're workin' around is close by, try and start up a conversation with them. About the profession, about their experiences, about your goals, etc. Show interest. These are some things that I picked up from my pre-med advisor who described two students who volunteered at the hospital for a job that was pretty much carrying samples to and from the lab. One student quit after about a month or two because he felt it was pointless. The other student made the most of her time by being assertive and showing interest around the doctors she worked around...he got rejected from medical schools and she was accepted after explaining her experiences in working with the doctors in her interviews.
Anyway, I hope my advice has helped. Just a shout out to let you know that you aren't alone in your feelings about volunteering in the hospital.