Canadian question about road laws and Class A motorhome

Just bought a used 1994 Winnebago Adventurer 32 in great shape, I'm loving it but I must confess the motor noise is a bit much when driving at highway speeds. But this isn't my issue.

When I and my wife snowbird south for the winter, do I conform to truck speeds on the interstate? And are there other laws, like having to stay in the right lane, do I need to know about.