Very nice bed and breakfast in quiet Ucluelet (Vancouver Island, on the Pacific coast). Very private and geared toward couples. They have winter "Storm Watch" rates which can be half the summer rates.
King George Highway, White Rock (Surrey).
Everything from cake servers, water boiler/dispensers to helium tanks, tents, tables, chairs, chair covers. Even a wooden "dance floor"!
It's not really a vendor... but my handmade-low-cost invitations were basically this fold. No envelope needed! Just get fancy paper.
Granville Street, Vancouver.
Pick any of their flavours to make a wedding cake out of. We picked chocolate mousse (and saved money by getting a 'birthday cake', which is not as tall).
Columbia Street, New Westminster.
Second-hand wedding dresses. Pay half for deposit when you pick, they will dry clean it, and you pay the other half when you pick it up. They offered to steam the wrinkles out the week before the wedding for free (although it was too far for me to take that offer). I found the cutest corset-style one that I didn't have to get altered at all!
Cambie Street, Vancouver.
Very experienced and friendly; let me come a few times to pick the correct colours. (gave me flower for my hair free)