We are planning a pretty casual wedding.  It is going to be at a yacht club (not a really fancy place, but a nice setting, with a nice green lawn on the water and a reception hall inside).  We are going to set up a tent for the ceremony and also BBQ outside after.  We have someone who will do all the cooking, he is a trained chef but isn't a professional caterer or anything.  I haven't sat down with him yet to plan, I am still thinking of ideas.  
Right now I am wondering about meats to serve.  We were thinking maybe something like chicken skewers, like soulvaki, steaks, etc.  Any other ideas of type of meat that may be good. 
I am also thinking of different sauces, like maybe a few signature BBQ sauces or something.  
I love making things from scratch and thought it would be fun to make up some sauces.  I have a lot of time to test out recipes.  I am just looking for ideas to cover bases, like a spicy sauce,  a smokey type sauce.  Maybe a sauce for the chicken.
Any ideas or suggestions are welcome.
To emphasize, this is in the very start of planning, just kind of looking for ideas here.