Seriously, I don't know what I was thinking - I have paid for it so I can't really back out now.
We will be outside for part of it - AND IT IS RAINING TODAY!!!!
I am hoping I will look like this afterwards....
Right now I feel a bit like this....
I am hoping I will look like this afterwards.... 
But I think i will feel more like this....
*EDIT* - I made it thru the afternoon - we had lots of rest breaks so it wasn't as bad as I thought it would be - I actually really enjoyed myself. I managed to squat 145lbs,dead lift 130lbs, tractor pull 170lbs and bench press 85lbs (not bad for my chicken arms) - little ole me lifted all that weight! YEOW! I am strong like bull ;)
