I always have a couple sets of four 16-inch anchors in my tool box. These have a three inch blade on them. My OFF-ROAD POPUP has eyelets in the four corners of the roof and I run 1-inch ratchet web straps to the ground when I setup. This keeps my POPUP from moving side to side. Without the straps I can reach up above the door and push in and it will move the walls a good six inches back and fourth. There is no movement from end to end...
It knocked off my microwave one time sitting on a shelf so thats when I started using web strap tie downs.
These anchors screw right into the ground real easy with a #2 screwdriver and leave no marks where you removes them. Think I got a couple of these sets from PEPBOYS...

You can see one of the 1-inch eyelets in this photo next to my antenna mount.

Roy Ken