Tyre question for the new astro?

[rollingon4]

Quick one guys, will need to order more tyres at some point soon, with the surface of the astro being so closed and smooth with the volume of sand in it, do you think mini spikes will still be the preferred choice or would pins be better? My guess was that mini spikes would have no penetrative effect in that surface and yeah I'm too tight to buy a shedload of tyres to test them out, with my driving won't make too much difference anyway