It can be similar or a different hotel of the similar rating. Probable hotel names are mentioned in the itinerary. Please note you cannot stay on the bus if you skip some optional activity. Make sure that you coordinate with Tour guide and stay with the group with next activity. You can skip some optional activities during the tour and plan something on your own.
So, when they are closed they will be replaced with some other attraction. On fewer occasions, Tour Guide has to skip an attraction or few during the tour depending on weather, traffic, group interest or some other reason.
So, it may be different from what is mentioned on the tour page. The order of activities held during the tour is planned by the tour guide. The order of itinerary may change without any notice depending on weather situations or for some other unforeseen circumstances.