I've been reading all the posts on the message board but haven't seen this question asked: how do you figure what temp. to try to achieve when shipping during the summer heat? Also, I mostly see snake shipping info, and I'm shipping Bearded Dragons. I'm guessing I'll still need to include heat packs because of the low temps. in flying an overnight package(?). However I have shipped from Oregon to California during the summer with just a well insulated box and lots of shreaded paper and no heat packs, but have never shipped further than one state away. Any input is appreciated!