One would need the right geometry, so that an oblique approach can be made to work - it's easier when the goal is simply to hit the opening of a wider and protected harbor - a long narrow channel downwind still wouldn't work.
I've managed to heave to the DS in a variety of conditions, but have had it fail at higher wind speeds. Heaving to involves the balance between the backwinded jib trying to swing the bow downwind and the tiller steering the boat back upwind. The main is usually just barely sheeted in.
Here's a clickable thumbnail of a diagram:
I suspect that in higher winds, what happened is that the full jib overpowers the tiller and the boat turns downwind. Sheeting in the main should help with the balance, but too much and the boat just starts sailing. A roller-furled jib could be partially furled, perhaps. (Something to think about if I ever get one).
But when it works, it's magical how much calmer the boat is and how stable (there's no need to adjust the tiller or jib).
Here's a diagram of the parallel parking while hove to method:
I've actually tried this maneuver toward the end of last season, when I needed to "parallel park" at a dock downwind and right angles to the wind, with a single small space between two other boats.
Everything worked fine, except I mis-estimated the direction of the drift, and unfortunately it wasn't in the direction where a bit more mainsheet would have given the desired correction. (I would have been well positioned to dock alongside one of the boats). Figuring out a good starting position for this maneuver will take some practice.