I regret to say ive never had the chance to be a part of an indoor drumline myself, I very much admire the amazing talent and effort put out by many great drumlines out there, but I personally rather enjoy percussion ensembles a little bit more. This may be because i just enjoy having a greater variety of instrumental color you just cant find in a performance on only drums, or because im biast being a marimba player myself. Im betting its somewhere inbetween....