I've used the two hands on tree one on top of the other or fallen tree but you need forearm/hand strength to pull it off.

I have strong legs/thighs so just squatting isn't a problem.
That gadget might not be as much of a game changer as you might think.

If your Queen doesn't have strong thighs/legs and she's set-up to far from a limb to use it to pull herself upright, you could find her sitting on the ground/poo and cursing you for getting it for her.  ;) ;D ;D