Usually, companies do not count it as an extra piece of luggage. (mommystroller.com)
To avoid additional costs during the cycling portion of this tour we recommend you only bring 1 large piece of luggage and 1 day pack / small backpack with you on tour. (tripcentral.ca)
Space is limited on transportation, so there is a limit of one main piece of luggage per person. (tripcentral.ca)