While traveling in Western Canada last summer, I purchased a SIM card for my IPad. I believe it was $30 per month for 2g of data. It would have been much cheaper if I had had a Canadian credit card and done automatic withdrawal - we were there for slightly over a month. Our tow car has OnStar and we could make all our calls without extra charges. Most of the campgrounds had wifi, but it was often very, very slow and often impossible so the extra bit on my IPad was great for those times .