Ok. If I may try to summarize what I think has been suggested here: Best to avoid a single bag, whether mounting front or rear. Balance is good. If the load is decently light, a front rack/double pannier setup will work. But might not hurt to mount a rear rack as well for a tent/sleeping gear.

I'm just looking to tour solo and self supported for a three day ride on crushed limestone/occasional pavement and want to make sure I get the right set up.