none of my cams have a viewing screen. i tote my digital camera with me in a backpack when checking my game camera's. this way i have a camera readily available if i want one for taking a picture of wildlife and can view my trail cam pic's in the field. not to mention saving the extra $60-$100 per cam.

I just got my first one too. I got the Stealth Sniper Pro for $149 at Cabelas. Does not have the built in viewer but it takes nice pics. Now all my hunting is done on public ground and I have a several places I hunt and not too far from home. So I only leave the camera out a few days, bring it home and download the pics and go out and put it somewhere else.
I want to see what deer are using the different areas and not getting pics of the same deer day after day.

I would never use the little screen, why pay extra to put one on each camera when you could be looking at needing a whole bunch? I have a little laptop I carry in the truck with me, it will read the cards and has a much bigger screen than any of those little things the Trail Cam companies sell.
FYI the new big thing in trail cams is a wireless downloader deal. The big Idea is u pull in to your hunting spot and this thing down loads your pictures over the wireless. So no smell at all to go check your trail cams, or having to hike out there to get them which is my favorite part.
The other big idea is to use the cell phone network to down load the pictures. This time you don't even have to go to your hunting land. The pictures end up in your email. Its much more expensive and I favor the former over the latter.

Waste in my opinion, I bringa camera to do a quick view to make sure the camera is working and just to get an idea if I got something good but I always swap out the cards and bring them home to dump the pics, if I left them in for more than a couple weeks I would have to sift through 5-600 pics which can be a pain but is fun at the same time