One question. Have you tried them at Oshkosh?

No - but I did read this prior to responding:

We actually got a couple of them in, eventually, by carrying buckets of
water over to the plane, and pouring them into the parched ground. This
softened the soil enough for the screw-ins to "bite" and stay put, sort
of.)
Other years it's never been as much of a problem, so I think we were just
in a bad spot, compounded by a summer-long drought.

And I have used them on mountains (really too heavy to carry up - won't
do that again), on rock-strewn slopes in Nepal - in high winds, in open
meadows, peat based old growth forest and in snow. I also used them at
the Abbotsford Airshow this year which is very similar to Jays
description of Oshkosh - topsoil over gravel.

For what it takes, it is worth carrying some in addition to whatever
else he has. If we are really planning on camping in high winds, as was
mentioned in the post, then ideally we need several types of stakes.
Once we determine the type of ground that we have to use, we can choose
the most suitable stake. Also of course, a lot depends on the type of
tent - I am specifically recommending this type of stake with an
Xpedition type of tent. The Xpedition is is fact such a good tent (and
ridiculously cheap when compared to its competitors) that I have pitched
it on rock, in wind, without any stakes at all - bacause I couldn't get
them into the ground! On that occasion I lined the sides of the tent
with small rocks and used large rocks to hold the fly.

--

Tony Roberts
PP-ASEL
VFR OTT
Night
Almost Instrument
Cessna 172H C-GICE