Bags in rear only

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i know this subject has been beaten like a dead horse before..but the search brings up so much stuff..

best thing for bags in the rear so i can 1) have low ride height and cruise and then 2) haul my bikes

i dont wanna run compressor or tank, just a schrader kind of set up..i have a c notch and just wanna run in place of coils..whats the best for drop and cruise, fill and go..