UPDATE: They survived the plane ride back to L.A., even after being in my bag for about 6 hours (leaving for the airport until getting home). Then, I froze them and they actually tasted good the next morning, even before defrosting them! And lastly, I put a frozen donut in the microwave for 30 seconds and it was very tasty. Definitely not as good as fresh in the morning, but better than no vegan donut at all!