It seems as my suggestion would reflect what othere have posted. One suggestion though. Custom aside, the flag and any symbols that you have are secondary to the STORIES of him. My humble opinion would be to display your flag proudly on the fourth, while passing along stories of your dad to any younguns ( or any other family members )in your family. It's quite obvious that you felt quite attached to him. Make sure the younguns know what the stories are behind the man.