I've experienced 80MPH winds at Burning Man plus the occasional small cyclone that would send tents flying 20 feet into the air. I've seen all manner of tents, tarps, shade structure and camp chairs get ripped apart or go flying. I even saw a port-a-potty that had been knocked over. I'm hoping it was empty when that happened. Never saw an RV or trailer of any kind look like it was about to tip. You're fine. Just keep all your stuff either inside or securely tied down.
Having said that, it's always a good idea to have some good stakes and rope or ratcheting tie-downs on hand. For light stuff I use 12" roofing nails (cheap and extremely tough) and for really heavy duty stuff it's hard to beat a 24" length of rebar. Bend the end of it into an L or U shape so you can pound it all the way into the ground, save yourself some torn up ankles.