1. If you mean OUTSIDE the park, then, in general, no.
2. If you mean OUTSIDE the park, then, no.
1. If you mean INSIDE the park, then, yes.
2. If you mean INSIDE the park, the answer is that you may need to scout out a decent clear spot, but it's not impossible.
My wife asked me this very question the other night. We are doing an upcoming September trip and were only going to do the MK for MNSSHP and Epcot for the Food and Wine Festival. We had planned to do a complete day off so this might fit into our non-park day with Fantasia Gardens and Jellyrolls.