trailer tow

I have been towing a 5800 lbs TT with my 2011 QX56 for about an year now. No issues except few annoyances. If anyone else is towing with their QX56 or QX80, I'm looking for suggestions on what accessories you added or upgrades you made to make your towing experience better. Here are few things...

We just purchased a 2012 QX56 for my wife. I'd like to leave the rear bumper, trailer tow package cover off so she can put her bike rack in without messing with the cover all the time. But it is just plain ugly without it. Are there any after market trim packages that would at least cover...