I've used a handheld remote trigger (with a wire) for a long time on my Canon 5d. However, I am planning on buying the new Canon 5D back, and so I gave some thought to whether I might use my existing 5D back on my pole. (Getting scary!)
I was VERY pleased to find that there are a number of 3rd party companies manufacturing radio/wireless triggers for Canon cameras. Instead of paying $500 for the Canon unit, I got a simple two-stage trigger for $89 at Adorama, and the instructions say it will work up to 100 ft.
We still have not yet implemented any remote viewing capability on our camera, but I don't think we will need it as we've been doing it the "blind" method for years. With the remote trigger, I'll be able to set the 5d on bracketed images and just push the trigger and can take 3 bracketed images so that I can do high dynamic range pole photos!
Once I take some images, I'll try to post them. I've also make some changes to the pole to make things a lot safer for the expensive camera body, and I'll try to take a picture and show those too.
Here's the most recent pole photo with the cheapo camera that we use. I can't wait to see what my old 5d with some high dynamic images will take!

Margaret Hokkanen, Carlsbad Real Estate
As always beautiful pictures that make me wish mine looked that good.