I've towed with vans for years. My latest is a Chevy 3500 passenger van.
I remove the seats and can take all my toys with me.
How does it tow? Sensational.
My previous camper was 27ft and 5,300? lbs; The 6.0L engine has plenty of
torque and the transmission is bullet proof. Tows like a dream. Heavy duty brakes
work well.
The passenger version has windows (good), insulation (good) and finished inside
(good);
Mine is a 2008 with 80K miles and has never missed a beat - the wheelbase makes
towing super easy;
The only downsides:
1 - if it's white then eventually the paint will peel on the hood/roof.
2 - if you drop a gear or two on hills then there is some engine boom but
otherwise no problem.
3 - it's a van....... don't expect creature comforts.
I'm leaving for a 3,000 mile journey in Jan - I expect the van to behave perfectly.
Fee free to ask my other questions.
Gerry