Seasoned Hardscapers, I have a friend who needs some work done with some involving a small wall (around 2ft.) to be built. This backyard area is roughly 20' x 15' and gradually elevates up 12-14 inches to the neighbors back yard which is higher. This was an old garden from a previous owner that they would like to take back and make more lawn/living space with. I suggested the wall so as to eliminate a highly sloped backyard. I have done the Allan Block Retaining Wall course and will be using their Jumbo Junior stone. Please this is no time to argue about what block is best, it is what is readily available. I want this wall to last for them, so based on the knowledge obtained from the AB course would you advise on using drainage for this short wall? They also would like this wall to hold up a planting area to create a screen from the neighbors. Would a plant such as an arborvitae be a bad or good choice in terms of the wall holding up (roots, etc...). Also I have heard people using what we around here call "Crusher Run" for the base and #57 stone for the drainage stone behind the wall and also even for the base. I have even seen a 6" crusher base with 6" #57 base, which may be overkill for this small project. Any input on what you have found works best is appreciated. I have also seen mixed feelings on using a geotextile under the base and behind the drainage rock to prevent fines from working into the drainage stone. Again any input. I just want this to turn out great, as long as they want to do it. If you can help out with any information great! If you need more site info just let me know. Thanks in advance for any help.