wteffey wrote:
You might do this later in PS Elements with good results. You simply take two or more photos from exactly the same spot, with exactly the same settings,(a tripod makes it easier), then use the Photomerge Scene Cleaner. Worked like magic the few times I tried it, removing anything that moved between shots and replacing the empty spaces with the correct background. A little cloning finished the job.
Just about any software that has masks and layers will do. Just take several pictures with a tripod, so only the people change from image to image. Then in a new image put each picture in a different layer and just work your way through the layers masking out the people. I have found this is also a good way to take group pictures so that no one is yawning, or has eyes closed or is looking the wrong way etc.