Hi John,
don’t worry about using images from different days. RC can handle differences quite well. I once had a scan from a church where there was entirely different furniture (up to the wall mounted lights) from when I did my shots but it still worked fine. So if there is no change in geometry, there should be no problem at all. RC will just use the taped images for the boxes, but the laserscan should be much better suited for that anyway.
I also wouldn’t worry too terribly much about the missing blue lines since there is a threshold (which you can change). As long as the scans are in the right location and you don’t get any noise or doubled surfaces (steps), which is an alignment issue, then you should be fine.
BTW, I just looked at one of the images Tim uploaded for me and I am afraid that there is way too much post processing going on for any significant detail, it’s basically a mosaic. It’s better to have more noise than too much processing.