I just purchased a back up camera to put on my grain cart.  It should help when knowing when to pull up.

Here is what I got:

http://cgi.ebay.com/ebaymotors/Audiovox-Wireless-License-Plate-Backup-Camera-System-NR_W0QQitemZ120413283691QQcmdZViewItemQQptZCar_Video_Navigation?hash=item1c0930e56b&_trksid=p4506.c0.m245&_trkparms=72%3A1171%7C65%3A12%7C39%3A1%7C240%3A1318

It was about $65, and included free shipping.  It is an AudioVox, and claims to have 'night vision'.  Either way, it should work because my Kinze 1040 has a flood light up top.

I hope this works pretty good.  Man, if it does--what an inexpensive, wireless way to get 'er done!

It will be a while, but I will try and write back after wheat harvest and let everyone know if the wireless cam. survived.