Yes, you should not use anything but a 1 ton 3500 chevy. you may be able to get by with a 2500, but I would not.. But do not use a 1500 1/2 ton period.
I have 2 Chevy 3500 1 ton extended vans. I also carry a fresh and recovered water. IMHO, The 1 ton van has stronger brakes and suspension. The extended van offers more room for your gear. Even if you do not need the space now, you may in the future. I buy only used stuff so the initial cost is similar as compared to a standard van. The GM extended vans have also extend the wheelbase which distributes the load better. It takes longer to find the right van (at the right price), but well worth it at the end of the day. A Ford 1 ton extended has 2 disadvantages. Ford tacks on the extra 20" to the body and has the same wheelbase as the standard van. This does not spread out the load as well. Ford vans also sidetrack. Follow any Ford van and you will see what I mean. The rear of the van will sway from side to side as it is going straight dowm the road. I took delivery of 35 new 3/4 ton extended Ford vans for my team when I had a corporate job. Every one went down the road sideways. I do not know why?
I agree, spend the money up front and you will not be unhappy. Chevy's have some faults, but are a better buy than the ford vans.
