Carnage04
Long time ago on this forum I read that US residents should have no problem bringing in
ecig supplies for their own use. Personally I would look at it no differently than I would any other personal possession; no need to mention it. Also I would not have it out nor use it when going through the border.
The Cdn Advisory states that hardware is O.K. just not nicotine. So for sure hardware is OK. They are not illegal to use, so you'll be OK anywhere smoking is permitted.
Perhaps it would be worth using the search function to look for any Cdn border crossing posts to see if you can come up with other posts re this?
Hope you have a good visit!