We pulled a 27' SOB trailer all over the country with a 93 Astro Van. The GVW of the trailer was 5000 lbs. and we stayed within the limits. We probably had over 30,000 miles towing. When we finally got rid of the entire rig and traded up to the AS the Astro had 193,000 miles and didn't burn a drop of oil, the engine was never opened up and the tranny was as good as new.
That being said, the first year we had the unit, it was white knuckle driving like you've never want to see. I installed the pullrite hitch on the truck and everything settled down as it should.
When we got rid of the rig, I was digging through the literature on the truck and was surprised to find out the truck had a 3.42 rear end. Certainly a testament to the strength of the truck and not my brain.
I think you will be very happy with an Astro installed with a Hensley or a Pullrite. The wheelbase of the Astro is just too short for a travel traler without a proper sway control hitch.
-Life is a journey, not a destination.