I've actually been talking about going to a park and all of us hiking a couple of miles with our packs.

I weighed my daughter's REI Sprig with pajamas, panties, socks, a little stuffed bear, and her pillow, along with an empty 50 oz water bladder and it was ~2.5 lbs.

My living room floor has camping storage containers everywhere just waiting for my pack to arrive tomorrow! Gotta see how it all comes together and then weigh it all!