It was seamless. One big factor was that I didn't wait until the last minute to change things. So, since my vendors weren't out money - they switched me without asking me for a fee to switch or loss of deposit. Everyone on the fence take note: the longer you wait the harder and more expensive it will be. Others are switching and taking presumptive safe dates now. If you delay - it only makes it harder. I know that no one wants to change things. But honestly, letting go of the stress has made a huge difference to me.
If the new date doesn't work - we're eloping. I'm at almost 2 years of planning and I'm ready for the rest of my life with him.