On concrete or tarmac, steel wire or chain, under it, with short lengths coming above to tye on to. Ratchet straps for riding. Seems standard in SW US.
I'm not optimistic about anything I can carry onboard and drive into the ground. It's just so I can tick YES to the Q on the insurance claim form.
I've seen two pairs of angle iron backpacked to a seacliff top, driven into soft soil, and trusted to hold by a solo guy hanging at a cave mouth, and moving himself about to examine the rock. That should work for an aircraft on soft ground.