Also, consider using the location on 100 in Flagler. Sometimes the line at Sunshine is unbelievably long. You can drive to Flagler and back before you would be close to your turn at Sunshine had you stayed there.
They usually request 2 Bill's received at your current address. Ex: FPL, water, cable etc.
I would check online you may be able to do your address change online to save you all the hassle and the trip . Maybe look online and it also should tell you online all the document that are needed. Hope this helps !
Thanks! Your answer is awaiting moderation.