Sam,
Only experience I have had is I researched this pretty hard 3 or 4 years ago, and I didn't have much luck finding a reliable "wireless" camera that would give that much range and still have clear picture/video. I had came to the conclusion that if I wanted coverage to my shop I was going to have to bury some direct burial Cat5 cable and run them that way.
Like I said, that was 3 or 4 years ago, so there could be options out there now to satisfy those needs. But, with wireless you are always going to have reliability issues, will a big wind or inclement weather not your signal out? A lot of the wireless outfits were more expensive, would the extra money cover the amount of direct burial Cat5 cable you need to go ahead and put in a wired system for better reliability?
You may be forced into a wireless solution in your case though, because max distance on Cat5 cable is 328 feet (100m), you will be pushing that it looks like.
Keep us posted if you do put a setup in, I am still really interested in getting a system of my own for surveillance, so I will definitely be keeping an eye on this one.
