Why not look at what other properties in your area are charging for SuperBowl. They must have adjusted their prices for that weekend too.
As for minor damage - it's wear and tear and not something that you want to get stressed out about when it happens. Put a small amount aside from each booking to cover new towels, sheets etc. Different of course if someone shreds your towels and sheets, then yes, claim on your security deposit.
It's always a good idea to stock your property with items that can be replaced easily and individually, rather than saying an entire bedding set has been ruined because of a stain on a pillow case (which AirBnB won;t support either).
Good luck