We recently were planning a day of caching, and upon looking at the map, realized that we had failed to post an entire days worth of caching finds from many months ago. Not able to remember the date exactly, and knowing the location was a good 50 miles away, we decided to just go back out there again another day (still haven't managed to do so, however!) and find them again. If I recall, we had a lot going on that evening once we returned home, and just failed to log them.