The current requirements are include a lighter-than-air element and experience—in fact a considerable amount of lighter-than-air vehicle driver experience. From the discussions we've had with the people who fly them for the company we've partnered with, they say that rotary wingers are the best at operating or hoisting aboard the concepts of operating these vehicles, but I would say either one could satisfactorily perform the duties.
Evidence of meeting #36 for Transport, Infrastructure and Communities in the 41st Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was technology.
A recording is available from Parliament.