I have enough channels in the PA. Most times the room doesn't warrant micing. Volume isn't really the issue, it's the quality of tone from my toms that I am trying to tweak. When I am lamenting that my thin shelled toms don't sound as good as I want, it's the tone not the volume, which is adequate. The thin shelled rack toms seem to lose their lower frequencies from a distance unmiced. Not as noticeable with my floor tom. And it's not horrible, I'm just thinking that I could get a better tone at 20 feet with thicker shelled rack toms.Larry- at these gigs where you're considering going un-mic'd, is it because your band is using a different PA with too few channels for the kit? If not, and you're just concerned about being too loud for the room when mic'd, I'd suggest you reconsider.
Mosts gigs I mic my kick only. For the bigger rooms or outside I use one overhead, a kick and snare mic. If I'm miced, the thin shell is a non issue.