Trust me, it won't be sitting in an open truck. They'll take it back to the local depot and unload it there for the weekend. If you've got a truck or trailer, you can most likely call them and go pick it up if you've got a depot close by. I usually arrange to do this for any big shipments I've got coming in anyways because you can avoid home delivery charges and if I have it delivered to my work, the foreman gets PO'd when I tie up our forklift driver unloading personal stuff. I'd try that route if you want it for the weekend. Also, if they didn't call the number, then you aren't liable for any of the "extra" charges.
Rick