I have non-powered extended mirrors from GM on my 2002 3500. When I put my truck camper on, they don't extend far enough out to be able to see my fairly good size 23' boat and trailer when I am going down the highway. I can see it if I turn or swerve or something like that. Do you guys have any good ideas of mirrors that can be added to my extended mirrors to extend them out?

You can buy the CIPA slip ons. Also check out www.ttt-mirror.com (http://www.ttt-mirror.com)

Check this out:
Hercules Mirror (http://www.safedriving.com/bigaux.html)

I use the smaller version with my right Lucerix X-Mount mirror to check the blind spot.