I was looking at the Verizon coverage roaming map for Canada
. It's not very big, but as far as I can tell it only shows 1x for Saskatchewan. I assumed that if it existed, Verizon customers could use it. Unfortunately, the Sasktel coverage map is broken (at least for me), so I'll have to take your word for it.
Also, given that it's a CDMA phone, it can't connect to the HSPA network. So using a SIM or unlocking the device would be pointless if not impossible.