We just stayed at Harbor Ridge this year, same week, in unit 58 (no view of the water from this unit). Our weather was nice - hardly any rain, not cold, not hot. Most things were open, but some on a limited basis.
Harbor Ridge is great. We didn't need AC because it cooled off nicely in the evening. The upstairs bedroom was a loft and the downstairs bedroom was the more private of the two. It has two beds (I think 2 queens) and our friends had no complaints. I think that we may have had a split unit upstairs but I can't quite remember. We didn't need any AC while we were there so I didn't have to turn anything on. You will have everything that you need - the units was well equipped.
The only thing that wasn't running was the shuttle bus in Bar Harbor, but we didn't have any parking issues in Bar Harbor or in Acadia NP so it shouldn't matter. It was busy everywhere we went but didn't feel crowded. We are the folks who never make dinner reservations (we are not foodies

) and we were able to walk in to most restaurants. I feel like there may have been one place that couldn't accommodate us but otherwise it was fine. There were a couple of restaurants in Southwest Harbor that weren't open when we decided to go but a waiter at Cafe Drydock where we ate, as it was nearby *and* open, explained that it was staffing issues that was leading to issues with opening.
In addition to Cafe Drydock, we enjoyed Jordan Pond House, Blaze in BH (we only did lunch here but it was located across the street from a place that had live music so it was great if you ate outside), Atlantic Brewing (Town Hill location), the Sidestreet Cafe (BH), McKays Public House (BH). We also went to Beals and the Upper Deck Cafe, Both were ok. The rest of our meals were made at home and the grocery store in BH was a big store, with everything that you need.
We hiked a lot - I would just check trails on AllTrails for ones that suit you. The carriage roads are just long walks, nothing strenuous, and we found the other trails to be rocky with a lot of roots no matter how easy the trails were. IMO hiking shoes/trail runners are a must have. We drove up to Cadillac Mountain because the trails up looked longer that we thought that we wanted to do, but next time we would hike up instead. If you are driving up to Cadillac Mt, you need parking reservations from recreation.gov. Our favorite hike was probably the loop around Jordan Pond. We went counter clockwise and it was a really pretty hike. Even though it is an easy, flat trail, there are some rocky parts around the back side of the pond that are a bit tricky. After our hike, while waiting in line for our lunch at Jordan Pond House, we saw two SAR responses and heard them discussing the incidents. Two different women had fallen near the rocky parts and had broken their ankles. These incidents happened about 15 min apart. Crazy. But what was crazy were the number of people I saw hiking in flip flops or street shoes/sandals. We also saw a woman fall and break her wrist near the Beehive trail. So go slow, wear the right shoes, and watch where your feet are going.
We took a ferry over to Great Cranberry Island to hike. It was a fun diversion but surprisingly we had *a lot* more bugs on that trail, and the trail was kind of wet, with narrow boards to get through the worst of the marshy parts. The boards were wide enough to walk single file comfortably. It wasn't awful, but it wasn't great either. I felt like other reviewers had more fun than we did. I do think that the amount of time that we spent battling the bugs may have clouded my perception. There was a single sandwich shop over there for food. Kind of a "you get what you get" place. My favorite part of the visit was their little museum.
It was a great week, and Harbor Ridge is in a fantastic location.