Hi everyone, I'm in need of some advice. My parents want me to do some work for them this includes, 900sq.ft(60'x15,)drive way, 120sq.ft walk(20x3) steps to front door, 650sq.ft patio (variable widths and lengths) 2 retaining walls one 150' long and the other 50'. I've done retaining walls, patios, and crushed stone driveways. I've never done a paver driveway before. Here are some problems I am having: I recommended to my parents to use at least a 4" paver for the driveway due to the vehicles they own(2 ,3/4 ton pickups, a suburban, and a calssic car that sits in one spot for most the spring and summer) they can't find any 4" pavers they like, and really don't want to buy any over the internet. Do you think that 4" thick pavers are over kill? I'm using a geotextile fabric, then 18" of #2 crusher run http://www.elamsand.com/stone.php compacted every 3 inches, for the paver setting I'm using 1" layer of stone dust and topping of the pavers with polymeric sand. I'm unsure if I should use geo-grid or not. I am located in NY (it can only help right?) Both my parents and I are using this as a learning experience. I just want to make sure the driveway last longer then I do, and that it has minimal maintenance issues. Thanks for reading.