I am getting an Acadia without towing package. I have nothing to tow. I am looking at adding the bike or ski carrier some day. Wondering if anyone knows what would be needed to add this. Is the removable hitch cover on all bumpers or just those with the tow package? Is there a receiver there or do I need to have one installed? I think I still have time to add the towing package if this is all too complicated and expensive to do without the package. I did not need the extra cooler or electronics. Thought it might be easier and cheaper to just add what I need later. Maybe not?