SimplyStar said it well. I'm so sorry your plans are being interfered with. The solid bits increase chance of cancer. It's still very, very low and nothing to panic over. However, you want someone you know and have picked to take it out so it doesn't rupture and go all over. If your gyno is doing the surgery, make sure a gyno-oncol is on call to come in if the biospy during surgery does show cancer. Statistics show a much better long term prognosis if the intial debunking (removal) is done by a more experienced gyno-oncol in the case of ovca. You may want a 2nd opinion with a gyno-oncol before the surgery just to be sure that it isn't a more complex procedure that's needed (but schedule it meanwhile). I was in Belize this winter. It was very nice and I'm sure you'll enjoy when you get there - but it will wait for you!!!
Your doctor is giving you very good advice, if the cyst would rupture you will have acute pain, and could possibly end up in a hospital with doctors you don't know. A cyst that size, and with those componets needs to be removed. There are times when health issues come up in life that make our plans change. If the cyst would rupture also you are setting up a situation that could lead you to have emergency surgery to clean the belly up. Bleeding would occur. You also need a pathology report on that tissue to check to see if it benign, which it probably is. Your doctor was concerned enough to call you and advise you not to go, I would listen to her.