Hi, we always drive down from Boston towing our popup. In the past we've always stayed at Preferred sites. They are closer to transportation and Pioneer Hall. This year we are staying in a full hookup loop (hopefully the 800 loop). Most loops have their own comfort stations (somewhere on this board there's a map of FW and it will show you where loops and comfort stations are).
We have found it to be easier on the wallet to buy our hopper passes throughout the year when we have extra cash, so by the time we arrive we only have to come up with spending money.
The drive isn't bad at all - we've done it for the last 6 or 7 years - we drive straight thru.
Take care!