Splash Landings has the smallest rooms. Alton Towers Hotel rooms are fine, not too small but not massive and its only a short walk along the corridors to the bar in the atrium. It isn't very kiddie, but the standard rooms do have bunkbeds so unless you get one of the rooms with a double and a single, she may be in the bunk beds. Otherwise the hotel is fairly "adult" feeling. Personally we've never paid for the Moon Voyage or artic rooms as the standard ones are fine. I think the enchanted lodge rooms are a little bigger (I've never stayed in one) and if you are going in a warmer time of year it should be fine walking outside. Nowadays we only visit AT for the fireworks nights, so we like the Alton Towers Hotel for the bar and indoor corridors. But this year the price was coming out too high (I refuse to pay more than £150 B&B) so we have the Premier Inn Uttoxeter booked, assuming the fireworks go ahead.