Most of these groups tune down I've found,so it may be hard to pick the right key at first.All scales are rigid in their composition.Fortunately,they can be moved around,and that can make a huge difference in terms of range and fretboard coverage.Specific to your query,however,as an example....

Em harmonic minor-E F# G A B C D# E
Am harmonic minor-A B C D E F G# A

Keeping the distance (pattern) between the notes the same throughout,it can be transposed to any key.And,keeping true to the scale structure can be started at any note,though depending on the background chord,some are better to start from than others-i.e.starting with a G# with an Am as the backing chord would be undesirably dissonant at best.The secret to this scale,though,is the "leading-tone-resolution".In Am,the G#,being the major third of E maj,E Maj being the "authentic" cadence chord for Am,almost demands that the player resolve to A,which is how well-structured music,and guitar solos are composed.Knowledge of the entire fretboard from open to 22/24 is,imho,indispensable.Like a map,knowing where you are makes it incalcuably easier to navigate to where you want to go.