I found out from Canada Customs today that you do not have to walk to the US Side once you pay your 50 cent toll. You can just walk out on the bridge to take pictures no problem etc. You just need the proper documents to comback into Canada Customs is all. I called today to ask and was told you can walk out as far as you want but do not have to go to the American side, you can turn back anytime out on the bridge and you just have to go through Canada Customs with your passport, driver's license etc. I thought you had to proceed all the way over.