I think we'll try to the whole lot in one go and as my missus went to school in Avebury, it would be a fitting end, especialy on the 21st June.
They way I look at it is that you don't get that many chances to do the whole thing and in a few years there will be babies on the way etc, etc.. (god help us) and I think the fact that we did it with our own shelter and provisions will add to the challenge and satisfaction. (This excludes all camping next to pubs which is actually the aim but don't let on)
D.