Ken, I like that.
I have a similar situation. There are times that I'm in the gym every 2-3 days, then times that it exceeds a week. Work, general health, etc., all affect my schedule. I've been using an "undulating periodization" for progression, based on a very conservative index weight that allows a lot of room on the final "plus" set. As long as I can get some "plus" reps on the last set, I go ahead and work my way through the progression. Some assistance lifts that I would ordinarily do only once or twice per cycle, I'm now programming every workout, on the assumption that I won't be doing them too often. It's sad when you have to plan on inconsistency, but better to do it with a plan then randomly!
Our greatest fear should not be of failure, but of succeeding at things in life that don't really matter.--Francis Chan