Used to charter a bus and take about 30-40 friends tubing in Harper's Ferry once a summer (or sometimes we'd drive ourselves out there and then camp nearby). Unbelievably fun and you can rent tubes to hold your beer coolers as well while you float down the river. Haven't done that in about 4-5 years or so.
I go about two or three times a year.
You can use an outfitter and wait in those lines or you can buy the equipment (Wal Mart routinely has cheap tubes and PFD's for sale) do a shuttle run yourself and park a car at the take out spot, and then put everything in another car and drive to the River Riders campground (you'll need a parking pass from the RR office) for a longer ride than what you get with an outfitter. I've been doing it on my own for a few years and it's probably the best FREE experience you can get once you have all the equipment.
Anyway, if I get around to writing an article about it I'll spell it all out.
I never had friends later on like the ones I had when I was twelve. Jesus, does anyone?