Freezing whole strawberries
Okay. You don't want them to lose their shape or flavor when thawed. I don't know of any way that is possible. Fruits that contain a lot of water are going to be mushy when thawed. No matter how you do it. No exceptions.

The only suggestion I have for you is to maybe dehdrydate them for future use and then they can be rehydrated. That's not a great solution, just an option.