I've recently purchased a 365 scope cover from the US (thanks to astrofest raffle voucher
). It keeps everything dry during rain and keeps dust off everything. It's also somewhat insulated so it doesnt get too hot. one thing to note is that I had my DC power cable plugged in to the mount when i left it outside. It's now dead, cant tell you how scared I was thinking I bricked my mount. Anyways, the point is take off cables or plugs if you can.