Here is my take on this,if I'm wrong I'm sure someone will correct me.
The Party Q is a self contained unit, it has a built in 5 cfm fan and one temp probe for monitoring the pit temp. The whole unit simply attaches into the fan hole at the bottom of the grill.
So, you would not need a separate fan, and you cannot monitor the meat temp with this unit.
I have a Cyber Q II, which is a little over kill, but it can have a separate fan, pit temp probe and 2 meat temp probes (all of which can be replaced if they go bad).
When I first got mine, I was all worried about maintaining the temp overnight, but this really is a set-it and forget-it deal, once you have it at the temp you want, it will stay there way longer than you will ever need it to, assuming you have enough fuel in the basket.
Hope this helps
And you going to love this grill