Planning the B-day

I am trying to Plan Thomas's 4th b-day. Every year I rember the birthdays past. His first b-day was way outragous.
Everyone wanted to come and be appart of his birthday. I was on strike and Thomas turned 1 the day before Superbowl Sunday! The guys on the picket line had decided we didnt need to be out there on superbowl sunday so we were taking the day off. They all got mad at me and told me I had to miss my sons First b-day and be on the picket line for the whole day! Being that we wernt going to be there the next day. They actually wanted me to miss his party or Call everyone on saturday and rescedual it for the next day! Well being it was his actual b-day I wanted to do it on that day.
The whole day went well the only regret I have to this day is my mil took over and I didnt get to help my son open his presents. My mother in law sat down and started opening them with him before I even got the video Camra set up.
The second birthday same thing happened my mother in law helped him open his presents. I was mad but what can I do. I will never get it back. Besides I took the day off of work and everyone said they would come didnt. It sucked for me.
Thomas's 3rd bday we did a low key superbowl party and a birthday party invited minumal people and I didnt take the day off of work. I sat down with him and opened the presents with him. My sil was in labor at the hospital and we knew she wouldnt be there. Kathy ( my sil ) had a baby girl the morning of the party the day before Thomas's b-day. Sooo my mother-in-law spent some of the party with us the rest with my sil. My other bil and sil came down and expected my mother in law to blow off my sons b-day party to go hang out with them. Thats typical. We didnt invite them because 1) They always make everything about them and 2) We have friends who said they will beat my bil down the next time they see him.
This year I am wondering what kinda drama will happen. It seams like something alwyas happens. No matter how hard I try to make the day about him.
We will see huh? My one set of bil sil arent invited and I am sure they will be pissed and make it all about them. But seriously What can I do?