Is this a "temp" phone you have for TV??? If it's your normal cellphone, the rules will be the same as up north...
If it's a temp phone, then all the rules could be different and you might use minutes for ALL calls, even the ones to other Verizon phones.
Besides, 450 minutes is over 7 hours of talking. You'll be in TV and drinking more of those Pina's at Cody's... No time for cellphone talking...
Enjoy your visit!