Hi Jool's,
There are currently 22 places left, however, the product team do add more capacity if there interest is there, this is not unusual.
In regards to climate and clothing, I hope you find the below useful:
Climate & Clothing
These guidelines apply mainly to the settled areas of southern Canada. Travellers heading to northern areas, such as the Yukon, the Northwest Territories, Nunavut and Labrador, should bring warm clothing for all but the summer months (and even in summer, at least a lightweight jacket is advisable). See the individual provinces and territories sections for more details.
For all months of the year, we recommend layers of clothing. This will allow for any change in weather conditions. Although most of Canada can enjoy warm summer temperatures, one waterproof top is always useful for occasional rain.
March: Moderate temperatures. Winter clothing with some medium weight clothing.
April: Milder days but the evenings are cool. Medium weight clothing including a topcoat and umbrella is recommended.
May: Warm days but cool at night. Medium weight and summer clothing recommended.
June: Warm, summer clothing with some medium weight clothing for cool evenings. The weather in June is ideal for travel and all outdoor activities.
July/August: These are the warmest months of the year. Lightweight summer clothing is recommended.
September: Warm days and cool evenings. Light- to medium weight clothing recommended.
October: Cool, with the first frost in the air.
November: Cool to frosty. Medium- to heavyweight clothing is recommended. First signs of snow.
December/January/February: Winter temperatures. Winter clothing is necessary (eg overcoat, hat, boots and gloves). Heavy snowfall in most provinces.
In the winter months it is useful to take sunglasses with you as the reflection of the snow can be a strain on the eyes. Rubber soled shoes are also recommended.
Kindest,
Ben