Transporting Live Rock

[molotov]

I'm looking to purchase some live rock from a fellow Canreefer this weekend. I have a couple of questions.

1. Is it best to transport it in water from his tank so there is no die off?
2. the journey back to my house is probably 30 min. Without a heater will I have to cure the dry rock?
3. Should I have the sand in my tank before placing the rock in my tank?

The live rock will be used to seed my dry rock which is already stacked and scaped in my tank (with no sand yet).

Thanks for your suggestions.