I just let the horses onto the pastures in wet fall and winter. It USUALLY freezes the ground eventually, so the going is not deep, just rough on top. We have a sand riding arena with grass in the center with some grassy area beside the arena as our sacrifice place. However with 6-7 horses, they can’t all be in there at one time. I let horses have one of the larger field/paddocks along with a good sized barnyard, for the other half of group turnout. Usually rotate the groups daily, so they get every-other-day on sand or small paddock.
I do lock them out of all the fields come spring melt, when the ground is SO SOFT they sink in deeply. I will work the field soil with my disc and chain drag when I can safely get the tractor in and not leave ruts. Working the dirt lightly (actually just slicing the ground with disc), then fertilizing, dragging it smooth works well. Then fields have time off to get dirt even more solid, grass started growing, works well in having nice, fairly rut-free pastures. As mentioned, each group of horses has the freedom of the arena area every 2nd day to run and tear around in.
When ground gets more solid (I have heavy clay dirt) then we start letting horses out to graze on LIMITED time. They are fed hay first, stomachs are pretty full before getting grazing time. Helps reduce intake slightly, don’t want any colics or laminitus from being on new grass. I start with once-a-day turnout of 15 minutes, which may add up to a few more minutes as they SLOWWLLY walk back to the barnyard, locked off the pasture. Not enough grazing time to hurt them. It takes TIME to get their stomach flora developed again for managing grass instead of hay.
My pastures have great plant roots, and despite the rough treatment of hooves in wet fall and winter, being disced and dragged come spring, the growth comes back FINE with a little time. I will need to mow once or twice, before horses are fully acclimated back to full time grazing again in May or June.
I would rather have them out on a large space, spreading out the hoof damage, running and playing hard, than churning my barnyards into goo. My young horses need space to run to grow and develop bodies properly!
OP might consider doing the fabric and adding surface material to sacrifice area when ground is barely soft. Then you WILL have a place to put them, off the really soft pasture that happens as the frost goes out of the dirt.