It looks like a defensive position to me. The bees appear to be concentrated at the hive openings with a few "scouting the perimeter". If they were ventilating the hive, the fanning would be obvious. If these are strong hives, there do not appear to be very many bees outside for a case of overcrowding or overheating.
Others report bees on the front porch after dark but, from pics I have seen, they are doing something different than your bees are. In the case of others, the bees appear to be simply either on guard duty or out for a bit of fresh air. Your bees appear to be clogging the hive openings.
It may be that the bees remember the nasty experiences of moving day in which there is not much to be done. Inspection might make things worse.
It may be that there are some foreign critters still in the hives from moving day. Inspection would be good.
It may be something else altogether. Inspection may help identify the problem.
The bottom line is that the odd behaviour continues and you are getting no peace of mind wondering and discussing it. I know you just moved the hives and, so, it would be really good to leave them alone for a good bit. However, if it were me, I would be doing a thorough inspection. The inspection might slow them down a week. No inspection might, worst case, result in lost hives due to not taking corrective action that might be identified. Given all the unknowns, I would opt for slowing them down a week rather than risking significant losses. I think that thorough inspection, including parasite assessments, is in order.
