Bellevue House, Manor and Inn are all managed by the front office at the corner of Catherine and Bellevue by super friendly staff. It is an easy 10 min jaunt downhill to the Waterfront, with a ton to do (but a bit of a slog walking back uphill). In the opposite direction, about 15 min walk away is the cliff walk by the mansions. Bellevue Trolley runs every 20 min which can save some walking.
CLIFF-WALK WARNING: spent 2 hrs all told, in part b/c of a 30 min dead-end portion of the walk. There are junctions with a number of roads along the walk (which is beautiful), but once past the Breakers, and the junction with Wetmore street, it is a dead-end, up to 2.0 miles round trip. As you go past Marblehouse and the Tea House (very pretty) we expected there must be some exit, but after going thru an eerily dark tunnel (literally under the Tea House where people above were having fun) you realize you are in a box canyon and will have to walk back to Wetmore. Fortunately, there is a Trolley stop right nearby-at Ruggles and Wetmore.
And if you get back to Bellevue Inn before 6:00 pm the adjoining Picnic Cafe has incredible pastries, coffee and some sandwiches. Single-Queen room was smallish but there are some nice sitting areas and our stay was wonderful, even with the extra walking! Newport Museum by the wharf is small but very cool and a nice complement to Fort Adams, 10 min ride West with great history. There is a slew of food places to try along the wharfs too.