That 66 and other K frames mentioned are much easier to pack compared to the 686 speaking from experience. The 686 is alot heavier and protrudes more under your shirt due to the cylinder diameter. My 3" 66-2 is my all time favorite revolver since 85. I used to pack it as my CCW till prices went way up on them. Back when my eyes were better a milk jug was not safe at 100 yards as its extremely accurate. The 3" barrel allows positive ejection of spent cases and shoots great. I do believe you would love that 3" as its the perfect size for doing just about anything.
Here is another pic that I've posted many a time. It will NEVER leave me.
Going back to my roots and just bought me a 2.5" 66-2 in great shape for a carry weapon. Holster and revolver should be here next week. Combat Commander is going to be pulling duty in the bedroom. Grew up on 1911's but am giving the watch to S&W for now.
I have zero luck with my local shops and do way better here on the forum for great buys from folks you can trust.