If you know that your dog does not do well with other dogs, this probably is not the place for them. That said, I would not mind house/dog-sitting at your place, I just won't bring my dog along with. Anything at my house or on the walks I go on though, they need to be at least decently trained and not aggressive/mean dogs. For the record, I've only had 1 dog I've ever dog sat that was not up to par. I can handle a good bit.

Walks, Runs, Play in large fields or parks (if owners permit taking them to the woods, farms, or parks... I have private access to several of those and usually frequent one of them once a day or more to let my dog play). I also live on a half acre and let them run around the fenced yard while I am outside reading/working, then when I come inside they have access to be in the house or continue to play in the yard for as long as they seem to be enjoying it.