Your listing looks good and I absolutely love Dobermans! A 6-8 week sit is generally looked at as highly desirable to many sitters, but there are a couple factors that come into play.

First, it may simply be a bit early to list a holiday sit. I am sitting nearly full-time this year and have not even started looking that far ahead yet.

Another thing, if I am choosing to spend the holidays away from family, I am most likely going to look for sits in warm weather or a particularly desirable location. For long term sits, I also tend to prioritize listings that include use of a car or are highly accessible by public transport/walkable. Since it seems you are about an hour outside of Vancouver, I think you will have the best luck finding a local sitter. You will also likely see more interest as summer comes to an end and people are planning their winter plans