I like my dogs a little charred, but others don't. I don't think I would smoke them per se, they will get some smoke via the charcoal, but a 350* grill will heat them through and give them a little char on the edges.
As far as the smokenator, sounds like you want it any ways for small cooks. Another tool in the cabinet. Why not. Just not sure if I would use it for the dogs. You are going to need all off your grill space.
Did you ever decide how many you are cooking?
Terry - KCBS member
LSG 24"x30"x36" Vertical Upright Smoker with Warming Oven
Weber Smokey Mountain 22.5" - Weber Genesis S-330
Pitmaster IQ-120 - Thermapen - Maverick ET-733
For info on any mods I have done to my WSM, please see this post