Maybe you should out your foot down one year,
Give them plenty of notice (like a month to 6 weeks
) and say
"I am more than happy to babysit but for one week only I will be unavailable" and make that week start and finish a couple of days before and after the show !!!
You wouldn't be disappointed like you were in Exeter you know!
I had been waiting to book my accommodation since the beginning of the year and suddenly (on June 1st) there were rooms available at the right price for me in the right hotel!!!
I have spoken about extending my room to the bookings clerk earlier this week who told me they had plenty of rooms available to extend to the Saturday night and for £59.00!!!
I don't know if this was just for me because I was already booked (actually cheaper than the rate I paid) but I'll tell you what Low, I'll take that room for you or you could share with me !!!
That's a gauntlet hitting the floor you can hear !!!!