Guys!
Thank you so much for all your wonderful advice. Everyone made some really good points I hadn't thought about. A special thanks to all the photographers that gave me tips on how you handle the expense of photographing friend's events.
Nic-Even though my FI buddy has a full time Mon-Fri job and does wedding photography on the weekend, I still agree with you that I would hate to put him out of some money that he could be making if he stays in town that weekend.
I think I will discuss with my FI the option of us paying for his travel plus services. I will bring up the good point that Kristi made about him benefiting by having DW pictures in his portfolio.
Thanks a bunch!!!!