Shipping tanks ahead when traveling in the U.S.

[KevinNM]

Having said that, all carriers require empty tanks with the valve removed.
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Not at all sure why this whole concept is good idea, but you do not need to remove the valve if shipping via a freight service. You are allowed to ship them with a minimal amount of pressure, (50 PSI iirc). I suspect you should both have a printout of that part of the shippers rules and a tank pressure checker with you if you want to ship them assembled, as well as carefully package them to protect the valve against damage.

 

[DivemasterDennis]

Use the tanks the dive ops provide. If you are diving independently, you can probably rent any size tank you want at a shop in the area of your destination. Leave your weights home too.
DivemasterDennis