How to tow travel trailer with 2 adults, 3 kids, and 2 dogs

I have been towing a Jayco Eagle 338, 39.6 feet ball to bumper with a 3500 Chevrolet Express van for 7 years. 6.0 liter engine 6 speed transmission. 4 point equalizer hitch. Tows great, we have over 30,000 miles doing that.
We will have 2-3 grandkids and 2 80 pound dogs with us. Lots of room and with the hitch set tows great. Everything stays inside locked up and dry.