Kel,
thanks for that, but I have to tell you, you should do it - it's absolutely fantastic.
every one is there for pretty much the same reason & as such, you meet a heap of great people.
the organisation is fantastic, given the huge volume of runners & walkers & actors! and the volunteers do a massive job. The crowd along the way is great & I have never seen so many people just enjoying themselves & no agro at all (not that I saw).
No one cares if you walk, crawl or roll, so long as you have fun.
Make sure you sign up for next year & if you want to run, just start building a little bit of training into your weekly routine.