Jaymac,
some outstanding advice here from everyone.
I hunt public land most of the time also. The ground blind is very effective once you learn how to brush it in.
Topping the ground blind with hunter orange is a exactly what you want to do. This is both for safety reasons and so someone can tell that they are walking up onto your area.
If your blind does not have a top use several hunter orangehats on the 4 corners

Someadvice on private land hunting:
1. ALWAYS respect their land. play by their rules and keep it better than you left it.
2. Offer to bring him/her meat.
3. I always write a thank you letter at the end of the season with vivid descriptions of the great timesI had on their land with my family.