The postings at summitpost.org are very helpful (as usual). To go to South Suicide, I like to start from the lower McHugh Lake (I never understood why maps show only one lake , I always saw 2 lakes!). A steep grassy slope leads to a ridge that is pleasant to follow to South Suicide. One step that may be avoidable was heroic for the dog. For going to McHugh Lake either take the McHugh creek trail (nice but pretty long!) or leave from Canyon Rd. 
Also one can easily go to South Suicide from Falls Creek. 
Going from South to North Suicide happens to be pleasant (with a short scramble not for dogs). 
For coming back climbing back to South Suicide is a pain. The upper portion is a really bad scree slope. So Hauser's gulley is tempting (but I did not do it). A good idea is to have a shuttle and go down to Falls Creek, if one went up the other way. I like it. 
I know the place only in summer conditions.

Labels: moderation: safe