Large humi and multi-hygros?

[livwire68]

Alright since I converted my closet into a humi (2' deep x9'Tx8'W) I have been concerned with humidity in various locations of it. Should I be, here is more info about the set up. The humidifier sits on the floor bottom left the fan (100cfm DC) sits at the bottom right about 10" off the ground (it is set to go off 6 times a day for a half hour at a time) Would it be in my best interest to set multiple hygros (high point and mid point) to monitor humidity? Or just one in the mid-high area furthest from the humidifier? I have not purchased a hygro yet, not sure if a basic one is going to work or multi-sensor. If I were to get a multi-sensor would they send info back to the main brain correctly only being 4' apart? Just trying to preserve my investments