I agree. Send off the BV form as soon as possible; do the KE online application soon because it's incredibly easy (remember you have to send off a photo afterwards) and do the online LEA application when you're ready.
Open evenings are a nightmare; we spent virtually every evening for 2 or 3 weeks rushing home, stuffing food down kids and dashing straight out to a school - and the KE open evenings were h*ll, thousands of hopefuls shuffling shoulder-to-shoulder from one classroom to the next!
I'm not doing that again next time! We'll try and get round some this September when young Miss 1880 is in Y5 (I've actually done the first one already - KEHS week before last - while she's still in Y4
- but I wasn't the only one! about 20% of the names on the sign-up form were for Y4 girls).