If the wind is blowing from one direction only, a TT or 5er can withstand some pretty strong head-on winds. After all, they are designed to travel down the road at 60-90 mph without blowing apart.
If you can park the camper facing directly into the wind, that is your best protection.
But, if the wind changes, and it shifts to blowing on the side, it doesn't take much to tip one over. With hurricanes, and all storms for that matter, the winds rotate, come in one direction and exit the opoposite direction. In between, you get all the sideways winds.
Still, if you can anticipate the wind direction, facing directly (nose of the camper) into the wind, is the best protection, should withstand some awful winds, just like driving down the road.
To anchor it down correct, you'd need anchors in the ground, and then some way to strap the camper to them. Most campers (none I know of) are equipped for anything like that.
To protect the camper, you are probably best to get it out of there to safe ground. Any chance you could move the camper ahead of time, to a relative that lies more inland, and leave it there a few days? Then you could return back home and tend to all those "animals and critters" that need attention till the very last moment?
If not, find a storage facility 200 miles away, and rent space for a month. Park the camper then until the storm passes over!
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