Every time I complete anything which may ask about risky things like private flying, I put in the same paragraph that seemed to satisfy most companies. I would just state that I flew light aircraft, stated my pilot qualifications, and stated that I expected to fly no more than a certain number of hours a year.
Sometimes they would exclude benefits when I was actually flying myself, and once I asked if I was covered if I fell off the wing as I exited the plane or broke my leg tripping on the walk to the plane and they said yes! Go Figure!
I figured if I was dead then I didn't care about insurance!