i dint know if i can describe this well enough but to fasten plastic to your hoop house you can do this:
get twice the length of each side of HH worth of 1" or 2" or whatever black pvc pipe (the kind used for irrigation lines) and cut into four lengths 2 for each side now with two of them you want to cut them almost in half lengthwise (i use tablesaw dont know if anything else would work) now fasten larger half to bottom of each side. now cover HH with poly min 10mil i would say make sure you have lots of overhang then push the full piece of pipe into the the half piece with the poly inbetween.
this is how i cover my HHs and it works great i live in wind central too and no problems yet!!!
i would use this technique for any covering not just clear poly.
be well
hope this helps
i can try to describe better if you have any questions