This depends on the weather. If it is good weather, the ceremony and cocktail hour will be outside and the reception will be held inside. If it is raining, the ceremony, cocktail hour, and reception will all be held inside. Please dress accordingly.
Generally going for a semi-formal feel, but wear what makes you comfortable. May weather can be unpredictable. If it is not raining, the ceremony and cocktail hour will be outdoors. So, check the weather and bring what you need to be warm enough. What will I be walking on? If it has not been raining, cocktail hour will be outside on the grass. The ceremony has a paved pathway with chairs on the grass.
You can find this information on the “travel” page.