The things you do between roles define you as a person and make you interesting. Use them as such. Tell the truth: I was sick, had enough savings to heal up and take some time off, and now I'm fresh and ready for the fight. I also did X Y Z and A B C, had some fun. Play time's over, and I'm looking to work hard.
If they can't appreciate that, then they wouldn't appreciate you in general. A self-solving problem.