Are all rat snakes aggressive?

[Bogertophis]

I dont know how ot works crosisng the border with an animal....

Regs- I'd sure find out ahead of time. Also, if you find yourself driving to pick-up, ALWAYS use a styrofoam box (or ice chest) to minimize temperature fluctuations
that can harm your little passenger, whether it's from cold or from heat- even sun streaming thru car windows or heat from vehicle floor can & have killed snakes
in transit.
But I suspect it's very do-able.