Thanks for the replies.  After doing more research, I discovered that absolutely none of the trunk style carriers are recommended for the Edge because of the rear spoiler.  I cannot use the hitch mounted one as I am already maxxed out on tongue weight when pulling my camper.  I may build a rack for the top of my popup camper.  I don't want to spend a lot of money as our bikes are not that expensive anyway(Walmart bikes for under $100),  I am thinking about the roof rack on the Edge that is recommended, though.  It would be nice to be able to haul the bikes with or without the camper.