[danimal]

Trailers would be grounded (not perfectly) if you put the stabilizing jacks or landing gear directly on the ground. If you put boards or blocks on the ground under them, then no. Either way, if your trailer takes a direct lightning hit most, if not all of the trailers' electronics would be toast.

Like the others said, I make sure the awning is up to avoid damage from windgusts. We live and camp mostly in Florida and have been through numerous thunderstorms and a tropical storm as well with no problems. Lots of shaking and rocking, though.