I really wish I could get a 10' bed on a truck but they don't make one unless you get a cab & chassis with a custom bed. A truck is for hauling (and towing) things so a bigger bed makes more sense to me. More firewood, tools, building materials, mulch, etc. Longer wheel base rides better. You will never need a slider hitch with a long bed.
Take that truck bed, add FW hitch, grill, bikes, firewood, generator, tool box, cooler, lawn chairs, golf clubs, etc. How much room do you have now.
Yes, my garage happens to be 40 feet deep. I guess I get the "must fit in the garage thing."