It took some preparation but everything ran really smoothly, and everyone enjoyed themselves. The kids ran up and down the levels and played on the swingset while the adults talked down below.
We had a delicious meal in which everyone had contributed something. Then we ended the evening with a campfire where we roasted marshmallows and made s'mores (something had been looking forward to with great anticipation "I am so excited because I saw this on t.v.!").
I too have been excited about doing this for quite awhile-- several years, in fact. It has taken a lot of work to get our backyard into condition so we could host a party. It was a lot of fun for us to be able to welcome everyone to our house, and I am looking forward to more barbecues this summer!!