Hey Scott, yeah we have a 2010 prado. It does a reasonable job. We had the ECU map done on ours about 6 thousand k's ago and has made a pretty big difference. We didn't get the full power upgrade because we had 250k on the clock already, and just being cautious.
We put airbags under the rear which made towing that much better compared to using load levellers for us. Like most of the auto tow rigs most of the time in 4th but if I have a good bit of highway it doesn't mind 5th and 100-110.
As you can see out work n play is a dual axle thing, and with out the ensuite comes just under the 2500kg towing capacity. Fuel wise the best I've managed to do is about the mid 15's, but generally mid 17's/100km is what I get.
We like it and it suits us, we have 4 kids so needed the room. There are other cars that would tow better but you cant knock a Toyota

If you want to know anything in particular let me know.
Cheers