I did one series of treatments with laser, which was mainly IPL -- which is sort of a low-grade laser. That did some good but it mainly turned all the remaining hair white, which makes them more or less untreatable with laser. So all of the rest of it has been with electrolysis, including all of the area you mentioned, from the backside of the balls all the way up the butt crack. I'm still working on stragglers in the crack.
But it is great to never shave, never have stubble, never endure a Brazillian wax. And best of all, never have to deal with hair being pulled when I get up from my seat somewhere.