Before we moved into our new house last year, we brought the boys over several times just to snoop around. Each time we put belly bands on them and thank goodness we did. They are both neutered but still lifted their leg to mark a few times.
When moving day came, they were already familiar with the house so there was very little adjustment. But we kept belly bands on for the first few days as a precaution.
Also, while the movers are packing up, be sure to keep Romeo in a safe room, out of the way!
Good luck!