Any team that wishes to travel from the US to Canada to play a game or in a tournament is requiredto obtain a USA Hockey travel permit for each instance of travel to Canada. For tournament bound teams, a copy of the travel permit must be included in your credentials book. Travel Permits are not valid for an entire season.
A copy of the travel permit form can be found here. The form should be completed at least 3 weeks (4 preferred) prior to travel and submitted to the registrar of your chartering organization, who must submit the request to the NY state registrar.
Each of individually also require documentation to travel to and from Canada. This includes appropriate governement issued photo identification and/or birth certificate, and a highly recommended consent letter if your child is travelling with only one parent or someone else.