I think that it looked like a rather relaxed and fun time for everyone. I dont think by the looks of the couple and family that they werent really after anything serious and super formal. So In my opinion you did fine with shooting candids. I think that there were some that had too harsh of lighting and others that were a little OOF, BUT there were also a few that were definate keepers and if the couple is happy with your results, then I would say you did what they asked you to.
Just take what went well and expand on it, and what didnt work for you try to remember not to repeat it. I talked a pro photog into helping me and giving me side classes (which I am really excited about), and he told me to always remember lighting and composition, and that I dont need 50K in camera equipment to take a wonderful picture as long as I understand the "basics" and more importantly.....apply them.