We are doing a very small informal wedding. We are inviting about 20 people and whomever can come, will. All of our guests are aware this is an "informal" wedding and that the normal wedding stuff is not taking place. We are keeping everything simple and with that our costs will be minimal. I will be purchasing something for my BM and his GM, and will be doing OOT bags, but other then that everything is up in the air.
So if you do choose having family, all you would really have to worry about would be your travel and wedding pkg costs. Stick with the most minimal wedding pkg bc why not? Your already paying for all your food and drinks, why pay more for some pkg deal? You can still have fun and not be so formal with a reception dinner in a ballroom or on the beach. Have dinner with everyone at one of the resort restuarants. That is at no extra cost. You dont have to pay for anyone's trip or excursions, or do any extras. Its your wedding and no one is going to be upset bc you didnt have decorations or centre peices, or OOT bags or whatever....if family is important - have them there. If your are as important to them as they are to you, then they wont care about all that extra "stuff", they will just be happy to be a part of your special day.