I am to ship a snake for someone to MO and it is VERY cold on the Northeast at the moment... it has been running in the mid 20s-low 30's. I told them that it isnt a good idea so ship at the moment, but both parties want it shipped. I am shipping the snake for someone for a trade with someone else.. Shipping would be Via Fed-ex. I dont feel comfortable below 40, but they both want it done. I have 2 40 hour heatpacks and will be dropping it right off to the Fedex terminal... should I be ok? Opinions? thanks in advance..