Lisa,
When my 3 girls got grown and married, I felt the same way. BUT, I remembered how hard it was on me when I had to chose/coordinate which family's house we would go to when to try to please everyone. It became even more stressful when I had children because EVERYONE expected the grandkids at their house on a holiday.
So, once the first daughter married, I began the tradition of celebrating each significant holiday on the Saturday AFTER the holiday. That way they could go to the in-laws without the stress and frustration of having to leave early, rush somewhere else, and in the end go home with cranky, exhausted children and really have no fun at all that day.
This has worked out sooooooooooo beautifully!
They have a good time at the in-laws and don't have to rush away from dinner to go eat another dinner somewhere else. They often have a day or two to recover from that and unwind the kids, then, they can get up leisurely on Saturday morning, mosey on over to our house, hang out, have dinner, enjoy company AND stay as late as they want because no one has to get up early and go to work the next day! PLUS - as a bonus, I'll keep any and all grandkids overnight that night that any of them want me to, so they can leave and have Saturday night, and a good part of Sunday to themselves to enjoy before getting the kids back. Sometimes I'll even have movie passes for each couple to entice them to get out and have some fun so I can enjoy some grandbaby lovin'. I'm sure you know how hard it is to get a Saturday night to yourself when you have little ones about!!
I get my girls and their families to myself for a happy, relaxed dinner, I get my grandbabies to myself for a night of fun, AND all 3 of my SILs think I am the most amazing, wonderful, fantastic MIL in the whole world.
Something to think about anyway...