Toyota 4Runner Towing V8 ... Larger trailers. Capable??

As someone who tows with a 2006 4 Runner, albeit a V6, not a V8, we wouldn't consider towing that big a trailer with our truck. Our Lance 1685 is 3800 dry weight, just under 5000 loaded. With the WDH & brake controller (and factory tow package), it pulls our smaller trailer just fine. But we wouldn't be comfortable towing a trailer almost 6000 lbs dry - meaning likely 7000 lbs loaded, maybe more for full-timing.