I think if you know the area (scout it out), consider the hours you want to be there, and of course, don't LOOK like a potential victim, you should be ok. I know the not looking like a victim thing is a hot-button, but I'm just thinking that if you don't seem to be ill at ease, and you dress in a way that doesn't attract attention, you'll be fine. I'm not a small guy at 6'3" and 225, but I've been in places where I knew I had to look like I belonged or face getting attention from the undesirables that I didn't want. I have a landscaping biz that has taken me to many places in Dallas that have some GREAT parks. Some of our best work has been along the Katy Trail through Highland Park! An awesome area to be sure, but you know of the trouble they've had there in recent years.. Take that military dude with you-I'd volunteer but my wife might not like it too much..LOL!