Just cancel all your listings.
They will go into your Unsold Items List and stay there for 90 days.
When you get back you can reopen them in a few minutes.
Whatever you do, DON'T leave that silly and hard to read kerfuffle of print.
Just the ALL CAPS is shouting and rude on the internet.
While you are away, eBay will be bringing in the Relisting Tool for sellers on eBay Canada who have been listing in US dollars. Be prepared for glitches if you use it.
Or you can reopen your listings one by one, moving some to eBaydotCOM , repricing others , dropping yet others.
Since your items are bulky, you are probably best to stay on dotCA where you have access to Canada Post Calculated Shipping.