Often when one creates a costume you find you have issues with vision. You have on several occasions seen a pair of video goggles incorporated in to the suit for the actor to see either where they are going or their performance.
This can be done cheaply with a camera module (see CMOS Camera Modules on EBay) that has A/V out http://www.ebay.com.au/itm/Mini-micro-CCTV-High-Resolution-Camera-spy-covert-security-480TVL-0-008LUX-AK-A-/152111485134?hash=item236a8d10ce:g:OvcAAOSwOVpXTsdm
and a pair of Video Glasses for around $160. http://www.ebay.com.au/itm/AU-Virtual-Reality-Video-Glasses-VR-Goggle-With-AV-Interface-Earphone-For-Drone/132145646272?_trksid=p2047675.c100005.m1851&_trkparms=aid=2220072&algo=SIC.MBE&ao=2&asc=20140106155344&meid=a19d2cfdee224c43b47423c49f636d68&pid=100005&rk=2&rkt=6&sd=272560484516
You can mount the camera anywhere on the outside of the suit and see where you are going.
However you will not have depth perception as you need 3D for that.
Generating a 3D system is difficult and expensive. However a company called SuppoModel has made a small board that can merge 2 camera feeds together and make it into a 3D side by side feed.
So now we can do the following
2 x CMOS camera's from EBay $60 http://www.ebay.com.au/itm/Mini-micro-CCTV-High-Resolution-Camera-spy-covert-security-480TVL-0-008LUX-AK-A-/152111485134?hash=item236a8d10ce:g:OvcAAOSwOVpXTsdm
1 x Video Goggles that are 3D side by side capable. $200 http://www.ebay.com.au/itm/Vision-720-68-inch-Virtual-Video-3D-Glasses-Theater-Eyewear-Display-Multi-media-/132146170458?hash=item1ec4868a5a:g:raAAAOSw-itXvUgX
And a SuppoModel.com http://suppomodel.com/FPV/FPV 3D camera multi view video.html
I have seen this around for about $70 on Ebay http://www.ebay.com.au/itm/282413570154
Someone with a little soldering skill can easily make up a system that would be perfect for walking around in. One additional point is that the Suppo board can handle up to 4 camera's so you can do a point down or look behind system fairly easily.