I have a small GPX file in GSAK to mark trailheads in our city. I imported this into Cachly, it shows the "caches" on the map, I can mark them as found (saving as a draft), and the icon on the map gets a check mark signifying the find. This will work out fine to get through the event day, allowing me to plan an efficient route to the caches. I can always straighten everything out once the caches are actually published. And maybe, groundspeak will accept the find if I have the correct GC number entered in Cachly.