I'd bring it - I've been at various times in the year - and I don't see a particular pattern to the bugs - I only know that sometimes they are bad (and you'll be very glad you have the repellant) and sometimes they're not.
One year we stayed on site from August 25 to September 3 and the mosquitoes were biting. Of course I got bit the most because mosquitoes love me!! The were particularly bad the night we went to Hoop-de-doo revue.
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