Hang in there, MaryAnn, you are on the home stretch to the trip. I am glad you did not cancel this trip. I hope it does it wonders for your frame of mind.
Yesterday I finished adjusting the fade in and outs to the music and adjusting volume to be consistent for the slideshow and some other tweaking with titles. I encountered major issues trying to export the file to a .mov file that would play the finished project outside of my computer where it was created. I googled the error message that I received, and it appears to be a common issue.
I spent most of the day watching it try to export, then having the process fail after about an hour and half. The good news was that since I was effectively tethered to my computer watching it run (very slowly), I got most of the house very clean and organized (at least for me). After the 4th failure, I resorted to calling Apple Care. Two calls to Apple support later and bing bing bing we have a winner. The file was too large with all the music added.
One kind soul at Apple support late on a Saturday night helped me separate it into two separate slideshows, and each one exported in about 30 minutes without failing. It plays just fine on DH's Sony large screen laptop, but in two parts.
Anyone buying a computer these days-buy as much RAM memory as you can. We have plenty of storage space but big projects like this required a lot of RAM. I am going to upgrade mine after this experience. We just got the off the shelf version in the store of the big iMac that has 4 gig of Ram. However, my big slide show at the highest resolution it would allow to be created (which of course is the one I went for :roll eyes

was like 10 gig or something. I don't even need that level so I think we are good.
I continue to learn new stuff every single day of my life. Keeps us humble, right?
GAGWTA!
I still don't know if we will be able to play it on my friend's projection screen.
But I think it is a good first effort.