  Recent advances in adaptive optics (AO) have led to the implementation of
wide field-of-view AO systems. A number of wide-field AO systems are also
planned for the forthcoming Extremely Large Telescopes. Such systems have
multiple wavefront sensors of different types, and usually multiple deformable
mirrors (DMs).
  Here, we report on our experience integrating cameras and DMs with the
real-time control systems of two wide-field AO systems. These are CANARY, which
has been operating on-sky since 2010, and DRAGON, which is a laboratory
adaptive optics real-time demonstrator instrument. We detail the issues and
difficulties that arose, along with the solutions we developed. We also provide
recommendations for consideration when developing future wide-field AO systems.
