protecting your telescope without a dome

I've recently gotten into the habit of leaving my refractor on a G11 with SGIG camera attacthed out on the back patio 24/7 waiting for clear skies. I have it covered with a telegizmo cover only - no light, no heater, no nothing. It stays dry in the rain, doesn't blow over in the wind, and starts right up when I want to image. And most importantly, it holds the polar alignment. Am I risking damaging the refractor ( NP101) or the camera, etc. Love to get your advice on this.. Bill