Hi, when I stayed at the Elysee, the buses were actually quite empty but I suspect this will depend on when you travel. The last bus in particular was always empty in my experience because it runs pretty late (i.e. after close of most bars/shops in Disney village) and by this point most people with kids have already left the parks. If you time the shuttles well, it's a lot less waiting about than for the RER. I also wouldn't be hugely worried even if the bus was packed because it's a really short journey, so you wouldn't be standing for long anyways and there was no one on the bus when it arrived at the Elysee (I think it's the first pick up). Hope this helps.