Chicken in MES, most MES owners on SMF are cooking their chickens at 270-275º. Most are pulling around 170º +/- 5 deg. For me the chicken isn't done until I can twist that drum stick and it wants to come off.
Beer can chicken was a simple way to keep Chicken moist on a hot grill, not a smoker. Since you already have a water pan working, the beer can isn't necessary. However it is a way to get some other flavors into the meat, and some MES owners still go with the beer can.
Most MES owner have issues with the chewy skin, it isn't crisp, so they remove it. I do a lot of chicken but most of it isn't in the MES, for whole birds I use the Weber Kettle indirect, and the birds come out perfect, juicy and completely cooked through. For fast pieces I will throw them in the MES for about 45 min, then finish on the gas grill to get the skin char we all like.
I have wanted to experiment with skinless in the MES but haven't bothered yet.