The night of May 4th did turn out well, and I was able to get color data, as well as a few more subs of luminosity for Messier 84, and Messier 86, part of Markarian's Chain. I struggled a bit with the processing getting color I was happy with, but I finally hit on this.
I also got some data for Messier 20. That remains to be processed. I supposedly have clear skies again tonight but at very least there is a lot of haze. I'll be checking the forecast carefully. Sometimes these nights are good for things like globulars.