Invitation/Outdoor Ceremony

Hi, guys. I am trying to finalize the information included in our invitations. Our ceremony and reception are both at a state park but the ceremony is outside and the reception will be inside. I am going to put the name of the reception space on the invitation since that is where guests will be parking and the ceremony location is just a short walk away. My question is, would you include in your invitation that the ceremony is outdoors? I just don't want anyone to be surprised. What would be the best way to word this? Thanks in advance for any advice!