its illegal and you will be made to unhook and tow one back to Alberta separately then come back for the other. no leniency on this one here. I looked into it because my dad always towed his fishing boat behind his 5th and wanted to bring it out so we could go fishing.
they enforce it, I just don't think anyone is stupid enough to try it
😉the amount of times I have driven from Kamloops to Edmonton going both the jasper and the Banff way in the last 35 years, I have never once seen a double tow in BC
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