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Picture above provided by Dawn Gahan of The Gahan Girls.
Sometimes it helps to have scenery on wheels--and wood is a good choice for its sturdiness in this case. You can see more pictures of this wall and it's matching pair at The Gahan Girls or view plans for it here. The plans don't include the wheel base, but she did tell me that the wheels are heavy duty casters.
This house on wheels shows that sometimes all you need is a few well-painted stones to create the suggestion of a stone wall...but of course, you could use any of the other methods mentioned in my other posts in my rock wall series to fill it with more stones.