Reckon you could be OK, I'll keep my fingers crossed.
When we had the air show in August, there were 400 parking tickets issued. I know its easy to park correctly but a lot of roads were closed off along the cliff tops. Kids moaning about walking too far etc.
We got the times wrong, doh! got down late, but there is a great big car park, on the left as you go back down a little bit of dual carriageway, towards the railway station, from the Landsdown/Christchurch Road. Only £4.00 for all day and there were still quite a few spaces left, even though we got there about an hour late.
