we do it all the time exp. as a spare you should have no problems
As for the tire shop if it is in U.S. then it is for legal concerns I bet

--------------------------------------------------
From: "craig cowan" <phishman068@GMAIL.COM>
Sent: Saturday, August 20, 2011 10:14 PM
To: <vanagon@GERRY.VANAGON.COM>
Subject:      Tubes in tires.

> I have a BFG that was damaged at the bead upon removal from the previous
> set
> of wheels. It is still a great tire with tons of tread. It just leaks air
> now. I'm thinking throw a tube in it, and since it will be used as a spare
> anyway..... it should hold air well then and serve it's purpose right?
>
> Are there any flaws in this statement? Are there problems with tubes?
> Is there a reason why 4 tire shops told me today that they can't legally
> put
> a tube in a tubeless tire, but all suggest that I do that?
>
> -Craig
>