In currently installing a brick patio, this is my first attempt at anything like this and has been a major learning experience. I've finished my excavation and am now putting the finishing touches on my dirt base. Compacting, checking the slope and level etc.
My question is, how much room for error do I have? How exact and flat does my dirt base need to be? Does it have to be absolutely perfect, or is it ok if there are some minor bumps and dips?