My lumber store charges $45 for a delivery, no matter the size. I can get a LOT of deliveries for the cost of a trailer+hitch. I know most people want to be able to get things themselves but to pay for the Gas for a large vehicle every day just so you can pick up some large items every so often just doesn't make sense to me.
I drive a Honda Fit and can get 8' long lumber home with the hatch shut. when I need to use sheet goods, I fork out the $45 and get a couple extra sheets to keep around for other projects.