I shoot on a BLM area in northern cal-e-fonia where the ground is hard and mostly rock. Driving a steel stake in is a chore. I normally shoot and sight in at 200 yards but want to try 300, 400 and 500.
I now haul cardboard boxes with the neon glo 10-12" paste on targets out and place a few of the plentiful rocks in the box to hold it upright.
I was thinking of shooting balloons or gallon jugs at the extended ranges but haven't come up with a suitable holder or frame. What kind of targets, devices have you found that can be set up, stay up in some wind and are easily removed.
Keep in mind BLM frowns on driving down range / cross country so whatever I come up with must be man (old man) portable.