Most employer-provided medical plans do not cover hyperbaric chambers. So, yes, it's good to have.
In British Columbia it is covered under provincial health plan but this will vary from province to province.My employer medical plan entitles me to covarage when out of the province(rest of Canada or international)
I also checked with my extended health plan and they cover as well. Kicker is that I don't want to have to pay first, get reimbursed later, so I also carry DAN.
Eric, also remember that if MSP pays, they only pay what they would pay here which will likely result in undercoverage - kind of like a hospital stay when travelling in the US. They cover, just not the full amount which, as my mother found out, can be a huge difference!