You can do a few things to secure your travel trailer in the case of high winds. First, change your RV's position. You want the front cap of your RV to face the direction of the wind. This will help avoid any potential issues with crosswinds and minimize the movement you feel inside during the storm.
Whether you can adjust the position of your RV or not, many RVers will hitch up their RVs to the tow vehicle and bring in their slide-outs. This will help make your RV more aerodynamic. Moving somewhere that provides any sort of wind block also helps, such as a sturdy treeline, a building, or even other campers. Just be aware of parking in the path of any dead trees, branches, or other environmental threats.
Another tactic you can use is to fill up your fresh water tank to add weight. Depending on the size of your fresh water tank, you can add several hundred pounds to your RV. If you’re worried about tipping over, you’ll want to add as much weight as possible.
Some campgrounds that frequently experience excessive winds will have tie-down straps. These straps will help secure a travel trailer to the ground and reduce the chances of any major issues from high winds. If you have them available, make sure you use them.