@Reiley1 firstly I would drop the high rated guest not least because it is a very low bar for guests.
Next we used to not have a great difference between low and high season predominantly because in a 1750s house the heating costs in low season were astronomical.
In fact if we get back into hosting we will probably close in January/February and travel to warmer climes ourselves. We were lucky to have no financing costs so our costs were variable and dominated by heating!
Our biggest problem was we tended to get late bookings so we couldn't start with a higher price and drop it as Christmas approached.
Best advice I can give is go look at comparable places near you and see what they have done.