Basically it is a******shoot. You can take a receiver from home and go camping and when you setup the dish you missed the hit and have to call in for a refresh. I have a test receiver sitting in the Van and have had it work 2 months later when I plug it in. Depends on the cycle of when they send your boxes the new encryption keys. Mine could be longer as it is a dealer account, yours maybe once a month for a residential??
But I think if you use a Canadian phone such as a cell or magic jack, vonage etc to call in for a hit if need be you be safe. Especially if is a number on your shaw account.