What is the "right" way to plan a wedding reception after being married for a year?

I would plan it like a vow renewal. its simpler then a wedding ceremony. no wedding party, no gifts. since your already married the ceremony would be different anyways since you cant exactly get remarried and sing new forms or anything. so I would suggest letting the family that doesnt know your married know that you are married becuase once they attned the ceremony they will figure it out and might be hurt you didnt tell them. otherwish plan it how you like and have fun.