I toured with a friend once......after three days I was beginning to contemplate murder. Thankfully, reason endured and we're still friendly...but he doesn't know how close he came...BwaaaaHAHAHAhahaha
Seriously, touring with a friend has its benefits, but touring solo has just as many. I think it's basically a tossup though I do like not having to negotiate with someone about routes, cuisine, responsibilities, etc.