There are 6 options.
1st as mentioned, use cordless drills, they use the agressive auger style bit. Make sure you have extra batteries and that they are kept warm(not cold in the truck overnight).
Use a "puncher" Basically it is a 8" point with a flat horizontal piece that your foot goes onto to step down on, and there is a vertical metal that goes up about 8" and comes back together and goes upwards a ways and then Ts out for handles.
There is the "slammer" which is punch. You use special hardened steel for it, it is about 3' long and another hollow pipe goes over it and has the end welded with hardened steel. You lift up the outer sleeve and then slam it down on the steel punch so it drive the point into the soil.
And there is the old, find a small crack in the ground, this works well on small dia. stakes like 3/16" alum. wind sock stakes.
Then there is the full bodies--no need to stake them.
Or shells, just do not use the stake--but they just don't look right.
The Audacity of Bull Crap.
"Typical: Gun-loving, bitter bible-thumping white person" Barack Obama.
Hey I resemble that comment!!! Those are FIGHTING WORDS!!!