We used the above idea and it was absolutely amazing!
We created a "pit" of 2 8' and 2 6' tables and then made a snowscape of sorts around it to cover the legs and be more inviting.
...found the recyclable peanuts through our local shippin/packaging wholesaler ($20 filled my back seat). took us 2 bags to fill our pit -but worth every bit of time. K-3 were delighted. thanks for the idea.