I'll be doing mine week to week, makes it more interesting for me. Don't know why people are doing it so far in advance.
For me it was lack of availability for the earlier 2 rounds. Most places near me focus on UK/Local beers so getting an American one seems tricky these days. Especially compared to the old days before the craft scene in the UK exploded and all you seemed to be able to find was US beers!
I was in Chorlton and there's a great wine shop there so i popped in and grabbed a few.
When i used to work in Manchester i also aimed to play weekly, it definitely makes it more exciting, used to have a great chat with the guys in Beermoth each week, they still remember me now as "that beer competition guy" and i don't go in very often. Nothing like the deadline day panic!
I think my aim will be to drink/enter my beers on a weekly basis though.