I would also caution against using other hotels, I mean I know that sometimes other hotels are cheaper but my general experience with any convention/conference is that its best to stay where its being held.
You can rest between panels, you have a place to store your goods without having to carry them all day and you don't risk missing out on improptu Org activities.
Plenty of people miss out on org pizza parties or get togethers because they happen unannounced at the end of the night, if you are there in the hotel you won't
So don't miss out reserve your room for the Org!!