Having checked with the airfield there is a problem! It will be closed from 10:00 am to 4:00 pm local for an air display. Probably rules it out for a day trip for us southerners. Shame to miss a regional rally, but there you go.
I'm hoping to go up Fri and back Sun Sat perhaps looks the most iffy weather wise, and the airfield is notammed shut from 10am Sat for the airshow so you'll have to set off pretty early (even in your MCR!) to arrive in time.