Perhaps an idea might be to get a chain breaker or have a link put on just in case something goes horribly wrong. You'll still have to walk but if you are like McGyver, you'll find a way to get back to home base.
C02 pump & cartridges are a good idea.
What about tubeless tires?? I recently switched over (new wheels too) & think they're great! They seem to have better grip. JetBlack wheels are a reasonably priced option(at least down this way..dunno up there)