I would soak the yucca very well before digging it up, and would probably wait until cooler weather. However, not knowing where you live, cannot give you a specific time.
When you do get it dug up, you might try putting it in a half oak wine barrel, or something similar. When you do get to your...
I have this happen all the time.They can be used in future years, although not as many of the seeds will sprout. It is best to keep them in a cool, dry place. I use either the "butter" section on my refrigerator door or the bottom of the pantry for seeds I am holding over.
Cat is correct, I just wanted to give you an example. I was the general manager at a deli and one of our specialties was a poppy seed cream cheese. The shop was very near a heavy construction company & the men were always in getting sandwiches, etc. One man failed a random drug test and, sure...