Isn't the whole idea of going to the wilderness ,at least subconsciously, to somehow connect with those people who used the area in earlier times? And to experience life free of modern conveniences and worries? 

I go with another person and try to be careful so as not to injury myself or fall out of the canoe. If I have an MI then not sure having a SPOT is going to get anyone there fast enough to save me anyway.  Even 10-15 years ago no one used such devices.  Can't recall reading about losing too many paddlers then.

I for one won't be using a SPOT or cell phone.