you probably want the mast fairly high, at least in way of the cockpit.
I winter store with the mast supported by the bow pulpit, stern pulpit, and a block fwd of the spray hood. Bow an stern pulpit supports have cross pieces and shaped blocks for the mast, all wood.
If the mast is going to be spending any time in the support, I'd be leery of the combination of shag carpet and 2-part urethane on the mast. The carpet will get wet and will probably blister the paint.