Where you stay is mostly a matter of budget, how you like the 'theme' of each hotel (which tends to be very subjective) and which parks you plan to spend the most time, but if going to all 4 parks that would be less of an issue. Doing a park each day for 8 consecutive days will be a LOT of walking which many will find exhausting, even if you take a break for part of each day. As previously mentioned, there are many threads about staying in mulitple hotels, some think it is a great idea, others not so much !!!