Is it permissible to have the Chosson and Kallah eat at totally separate locations?
If this is permissible, does the Kallah need to wash and make hamotzie where the Sheva Brochos will take place? or is it enough if she has in mind to bentch at the Sheva Brochos?
They may eat at separate places. When making the bracha hamotzi, she should have a mind that she wishes to continue eating in another location. In the location where the Sheva Brachos will take place, she should eat a bit of bread and Bentch there.