I like the idea of the orange pex over the top of the rebar. Just so happens coming up i am going to have some. i will use it in the spots that you have to stay away from. Issue I have found is you may know where your driveway is but someone else won't. So, if you can't plow or your equipment breaks down...... you end up with a mess if someone else does it. Tried the fiberglass and wood stakes. We have clay with rocks. This year with little rain the clay is real... hard, so if the top doesn't splinter, pounding it in, once you hit a rock it will, so you can only get one year. Wood great but if you hit them they break, then you can't find them in the snow and they don't like going through the blower, also can't bend back. With the rebar, if you run over it with the blower it just bends over out of your way, works so long as remember to go back and fold up. Good comments Steve