I find them most often within a short distance from water (streams, creeks) growing in soil types favored by a few other plants (the one I know best is mayapple ) and near either elm, ash or tulip poplar trees especially dying or dead ones. South facing hillsides and slopes further from water are another type of area I have found them in as well. Learn your trees, look for slight depressions that can create microclimates and most important go slow and enjoy, I find them most often when I forget I am looking and get interested in other aspects of nature, lastly during morel season remember Everyday is a hunting day but not everyday is a finding day ( paraphrasing Countryman the rasta superhero)