Richard
I'm still making my way around the website and found that you have info on camping and cycling. Why not cycle camping?
I've done this quite a few times, and with the right kit you can do it really cheaply, particularly if you free camp.
This year I took my 10 year old son on a 130 mile cycle camping trip to the Wales coast. We did it as a charity ride for Oesophageal Cancer Care - raising over £900. Those 4 days were some of the best of my 45 years. I really loved the whole thing, and to spend such quality time with a young son is priceless.
http://www.flickr.com/photos/the-edens/ ... 4465/show/