The only cabins I know of are at Turners Fish camp down the road from Potts Preserve.. I found their number on Facebook 3527260085...
Southwest water Management district does not have any cabins that I know of certainly not in this area or any of the water preserves we've stayed at which are quite a few of them. They typically have three options Backcountry where you hike in and tent. Primitive and equestrian.. which are typically set up quite similar although equestrian tends to have non-potable water options. All require you bring a tent or an RV. Or some just sleep in their car which is fine too. The only thing they really supply are fire rings and picnic tables.
I don't know but I can find out real soon will get back to you
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