First off, Welcome to Alberta!
As far as your rigs go you may be able to get them licensed as ATV’s. I did see a heavily modified Jeep TJ licenced as such a few years ago. I believe it was issued a new VIN as well.
My advice would be to contact a registry office and ask about it. And as an FYI, all vehicles used on crown land must be licenced and insured.
Good luck and let us know how it works out for you.
Oh yeah, the Calgary Jeep Association is having our annual Show & Shine this Sat at KMS tools, fell free to stop by and meet some fellow wheelers.