I am new to this and I need some advice. I am getting ready to do a brick patio in my backyard. it is going to be 240 sq/ft. How deep should I dig and how should I do the base. I was told 6" gravel, use a tamper, then 1" of sand, use a tamper, place my block and then use the tamper one last time. Is this correct? What is the best stone to use for the base? How do I figure out how much stone I need to fill the hole? Thanks in advance for your help.