Well, that's exactly
the reason we went with a pole & rope awning on our '64 Globetrotter.
The ZipDee armature prevents the door from opening beyond 90-degrees. They used to make a fitting that allowed you to release the bottom of the arm from the trailer and swing it out & stake it into the ground. It was a clip-type fitting. But it is my understanding that it is no longer offered as a standard fitting. It may be possible to customize a standard fitting with a clip to achieve the same result, but I'm not sure. Even if the bottom fitting issue can be resolved, I'm not sure the door would still be able to open 180-degrees (flat against the trailer) due to the top part of the armature.
We gave up exploring the various ZipDee options because we really like the pole & rope awning vintage look and that's want we really were after anyways. We've never looked back - we love our vintage style awning. With the GlobeTrotter's smaller size, I can put it up by myself - no problem.