@Alan2087 I have never been impressed with smart pricing. In our experience it went to the top of the range months out and then dropped to the min price as the date of stay approached. I also noticed it didn't react well or fast enough to local events such as concerts and festivals.
We ended up switching it off as it wasn't possible to set different min/max rates for the different seasons. When we did have it switched on we had a very tight min/max range so it didn't miss bookings or charge too little.
I assume the need for you to achieve 240 nights a year makes loss of bookings an additional worry