Hi, I wanted to give our experience, as we recently got back from our trip (park days were May 7 - 12) and used a combination of Toy Story shuttles and walking to and from the parks. We stayed at the Hampton Inn on Katella and had 5 park days. Overall, being close to the parking lot was great for our party and would recommend the area (and hotel) for future trips. We waited about 45 mins one morning for the bus going to
Disneyland, which ended up being the only time we used it going to the parks. This was around 9:15am. Give or take. The walk was around 18/20 minutes and was fine for us and our party and we did every other morning of our trip. And not worth the 45 min wait for a 5 minute bus ride... We went back to the hotel everyday for a break and never had an issue in either direction in the afternoon with waiting for the bus, as there was always one waiting or just arriving. Our breaks were usually from around 4:30-7:30/8pm.
At night we never waited more than 10 minutes. We left the parks between 10:30pm and midnight. The first night there we saw a decent size line, but we ended up walking back so I don't know how long that wait was. This was around 9:45/10:00pm.