Vortex Media Jacket Camera Medium
My timelapse setups usually run for 3-4 hours, and most of the time I'm not immediately near it. It's best to set it up and leave it alone. That way stray light from a flashlight, doesn't ruin the shot. I have been looking for a replacement for the cheap rain covers that I have used in the past. The Storm Jacket is compact when folded up and has a bungee closure at each end.
The Storm Jacket Pro Model, which I have, also has a large velcro opening on the bottom. That way you can use it with a tripod, or on a dolly. I've used it on the Dynamic Perception Stage Zero dolly and it worked great. The Storm Jacket is well made and will keep dew, rain, snow and dust off of the camera. The large openings make it easy to get at the camera, but close down tight to keep the weather out. I will be using this a lot, and highly recommend it.