chris,

there are no hotels in the phoenix park or on chesterfield ave. as this is a road in the phoenix park itself—there are a few close to the park itself and it depends on how much you want to spend–the newly opened castleknock hotel is very close to the rear of the park—there is the aisling hotel about 5 mins. walk from the front gate of the park and some b+b’s close to the front gate as well–there is a travelodge on the navan road which is about 10 mins walk from another entrance to the park–hope this helps