We had the Superbowl last year. Lots of people. Lots of $$$$. Lots of hosts raised their prices big time to cash in.
Those hosts stayed empty during the Superbowl 'week'.
Hosts who added a reasonable premium, as you might for a major holiday, were booked.
Does a solar eclipse have the visitor draw and, as importantly, the lack of accommodation availability, to generate an extraordinary demand/price? It's a "one day wonder" so set a ridiculous price, you have little to loose. Just don't count on that big pay-day.