
I would go to the all breed show, bearing in mind that Labradors are a popular breed, and you will have a chance to attend breed shows later.
Unless you know someone at the breed show it can be a bit intimidating attending one of these where everyone knows everyone. At an a; breed open show people won't all know each other and striking up a conversation may be easier.
Of course if you are not shy of making your pesence known to the officails at the breed show you may find yourself made most welcome, and taken under the wing so to speak.
You cqn be more incognito at the all breed show. The choice as they say is yours.
I would go for the local one, as it is so near, though with a breed show on the same day don't expect many good Labs in attendance.