Yeah Saturday is good for me, I'm sure MIL, FIL and OH should be capable of looking after a 5 year old for the day (and probably Sunday as well, as will need another day to recover).
Liz, if there's not that many of us, how about checking out Limo prices as well. I hear they are quite reasonable. Maybe you'd like me to do that hun?
If we are going to do it girls, we could do it in style with our posh frocks on! Ha