As mentioned above, most all sites can accomodate the usual street side slides without any issue. I've never seen a campsite that couldn't accomodate the awning on the curb side of the trailer...if the awning can go out, so can the slide, my curb side slide doesn't extend half as far as the awning does. If got a site where my awning couldn't go out, I'd be getting another site or moving on. Even "sardine" packed CGs haven't been an issue, aside from the issue of being that cramped, but, even in those campgrounds, opposing slides hasn't been an issue.
Love my three slides and I've never encountered a site that I couldn't use all three of them. You might have to "juggle" a bit to allow for the pedestal at some sites, but, I had to do that back when I had a single slide bumper pull. The 318SAB allows the use of the full kitchen, bathroom and bedroom with all three slides in. The bedroom slide, when in, does block some of the drawers in the dresser, but, that slide can be extended 8" or so, in an "emergency", for access to the drawers and then pulled back in; the slide is high enough to clear most any vehicle with the exception of a truck tractor and even in those circumstances you wouldn't be parked that close to anything. We try not to pack anything in those drawers that we would need in the type of scenario where we couldn't extend the slide anyway. In a pinch, the floor design is quite livable with all the slides in...you'd only be using it that way to catch a quick 40 winks before moving on, so, not being able to recline and watch television or fire up the computer for surfing isn't an issue with the slides in and with the full kitchen still open, restocking while on the road or fixing a meal isn't an issue.