Second guessing Venue

I know it shouldn't really matter where we get married, if it were up to my fiance we would just do it in the back yard, but the venue was important to me. We booked the Ceaders of Lebanon State park in the Juniper gazebo mainly because of the cost. Now that I've had time to think about it... The venue is beautiful but I always wanted an indoor wedding. I'm kinda panicking about this. I don't think there's really anything I can do about this. All of the decent places are so expensive... I don't do well in the outdoors. Advice Please!