Tail dollies and wing wheels, once removed are placed to the side,
forward of the wing tip where the pilot can see it, but far enough
away that the wing runner will not trip over it.

YES! This is the way to do it. When the pilot gets to "Dolly" on the
checklist, a quick look to the side confirms it is off. It helps if
your dolly is a unique color not to be confused with another.