All depends on how tight your slide is to that wall. I've used the command strip velcro to attach a wall clock in our trailer, so I know they're fairly slim. Your slide would have to be rubbing on the wall for it to really matter.
What I have noticed about the command strips though, is that they don't stick to the wallpaper like surfaces in the trailer. Cabinets are no problem, but whenever I tried to stick a command strip right to a wall with that wallpaper stuff on it, it would eventually fall off. Just something to keep an eye on.
There's no use crying over spilt milk... unless it's on your keyboard.