Theres nothing stopping you using a large board in strong winds, it all depends on how hard you can clench you sphincter.

Generally you use volume and surface area for getting you going, the lighter the winds the more V&S you need. With the stronger winds you don't need the volume.
Once planing a smaller board is going to be a lot easier to handle, whereas an overpowered big combo is going to be very exciting but also possibly rather painful and expensive.