Best Surface For An Indoor Site?

[Jon C]

Oh and also, one thing which neither surface helps with is keeping bunkers in place. Its a case of either using sandbags, or piling sand/wood up against the bunker and hoping it stays still.

if your using sup air bunkers either fill partially with water or sand and this will keep them upright.you can then move them around as much as you want to re-arrange the fields.