The Flag is already there my friend. You can not have your receivers on two different LNB's without them Knowing. You will one day get a call about it and they will offer you a 2nd Account for those and then you can turn off the home account while you are away, but you Still can not let them know you are going south with it. The 2nd location is only allowed in Canada. They cannot get to everyone at once, but if they talk to you and check your account I guarantee you there will be changes you may not like.
To go under the radar you need to have all your receivers on the same LNB and they need to think they are at your main location. We are instructed to upgrade every dish to the new one when we are on a service call. There is no going back and forth to the old LNB. (another flag) As will a US phone or IP address. You may get away with it for now, but in the future??
Next, don't leave your receivers down south for those that do. Bring them home, easier to hook them to a dish here and get a hit so they are good to take back down with you. Chances are you won't need to call them then.
You can also buy a new XKU LNB to take with you south if your place in Canada has been updated, Your local dealer should sell you one for around$65.
Please remember this program was slapped together very fast and still has a lot of bugs in it. I just talked to a customer yesterday that went for the 2nd location for his Coach and got 2 bills for the same amount. He told me that Shaw's system does not even have the 50% off for the 2nd location up and running yet.
Your not the only long winded one Gadget Guy :)
Keep the Shiny side Up. :)