Good luck. I would be surprised if they extend the warranty. Not exactly the best manufacturer out there.
I suggest you use it as much as possible when you get it out and take it back for more warranty work on the last day possible. I am almost positive the warranty will be in effect as long as you get the trailer into the dealer for repairs prior to the last day, even if they have it for weeks or months longer. Also, if they botch a repair or miss something that you brought it in for then that will be covered too.
2018 Voltage 3305