I've decided to give this a go. I've only previously bivvy'd or lightweight camped when walking. The logistics of what to carry and how / what bike are taxing my cells at the moment. <edit> We cycle camp quite a lot when touring but I wouldn't call it lightweight! </edit>
I've picked a spot about 1 hour from home for a practise run. I intend to ride there late-ish one Friday evening, hunker down, wake with the dawn chorus and pootle back home. If it all goes wrong I can easily pack and be home quickly, and without losing my sense of humour.
My steed options are the tourer with enough luggage-carrying capacity for an extended cycle-camping tour, the audax machine which is set up for a bar bag and something dangling from the saddle loops, or maybe the mountain bike and a rucksack.
I haven't yet figured out what I'm going to take with me either