Some people may have seen a related post of mine in one of the other forums. I just out down a patio using 12"x12"x1-3/4" patio blocks. They look like porous concrete like cinder blocks. Well they aren't as collectively flat as I would like. I think it is because the sand was damp and clumping and I didn't get it packed well so it had "soft" spots that I think collapsed a little once dried or pressure was applied. I am looking for tips on getting the sand well prepared and flat. I have seen instructions that say to keep the sand dry ( which may be difficult this time of year) and a few sites say to moisten the sand and pack it well using a tamper. Anyone have experience and can tell me some pros and cons of each way and some tips?