If you don't have the locks that some coaches have on the inside, then it would be safe to roll it out. But if you have the portable locks, be sure to remove them before extending the slide. I never have used them on my coach, but I know that Newmar coaches all have them, and they are a pain.
2002 Gulf Stream Scenic Cruiser
2018 Buick Envision Essence
Neway Freightliner chassis
Aventa II Blue Ox