No problem! I've done plenty of outdoor events. Just one big thing to consider: overhead protection for my equipment is required for all outdoor performances, rain or shine. If there will be a tent, gazebo, porch or any other shelter provided by you or the venue, that's awesome! If not, I can bring my own canopy tent, but I just need to know in advance so I can arrive early enough to set it up.
If you're planning an outdoor wedding, check out my Peter's Pointers blog post, "6 Must-Haves for Outdoor Weddings."