I just asked my uncle to officiate our wedding. He's super excited and we are too! He said he feels honored to do it! I've been in a few weddings (like 5) and to some, but most of their folks were ministers they hired. I don't recall what was done for my bestie's wedding (we asked our poetry professor). My uncle is definitely an amazingly colorful persona...it won't be a dull moment 
I want to compensate him and/or get him something nice. What's customary for this...especially a relative? Help!