I had my gallbladder out when I was 14! (Super-hereditary, apparently). My experience will probably be different then yours though.
I was sick with it for a while. I went to a near-by hospital twice that summer, and both times they sent me home saying it was the flu, even though my mother asked them to check my gallbladder (she had it out as well). So after about 6-7 mos. of being sick quite often it got to the point where I couldn't drink water without throwing up. I finally went to a different hospital and was diagnosed within minutes. Unfortunately because of the diagnostic delay, I was very dehydrated and had pancreatitis (sp?). So I had to wait a week before I could get surgery.
All in all, I was out of school for about two weeks I think. One week or so after surgery. Mine was done laproscopically as well. I had four incisions total, two on my side, one below my chest, and one inside of my navel. The worst part was the first day or two after surgery. I was in a lot of pain when I got out, but that didn't last too long. The car ride home wasn't too fun either, and I couldn't walk up and down stairs easily. Until this I never realised how much I used my stomach muscles. Also, I had pain in my shoulder for a week or two afterward, mostly when I would inhale, but also while sleeping. I believe the doctor told my why I might, but I can't remember now. This might just be a personal thing though.
But if you can handle the pain you were in before surgery, this shouldn't be too much of a problem. After a week I felt good as new. I haven't felt any differently now as I did before surgery.
Hope everything goes well for you! Good luck!
... wow, sorry for typing so much!!