Cold Packs ,onbottom of cooler wet news paper on top of cold packs, lobster,.wet newspaper again and then cold packs this setup will give you close to 2 days if they come out of water
I dont think you can come across with live could be wrong never tried it always tstuck to the canadian route but the method i have giving you is rock solid i have been doing it that way for 30 years plastic pop bottles frozen with water work great as well .
If you go the calis route stop at OZZIES on the side of the road and order the clams and a side lobster roll you wont regret it and you may want to build a house there
http://ugonnaeatthat.com/2008/08/06/new-brunswick-ossies-lunch/
Cheers
Peter