Around NYE 2019 we stayed at the Fairfield Inn on Orangethorpe. Getting to Disneyland was easy - typically less than 10 minutes. My wife slept in one morning and joined us later taking the Metro 460 bus. We also walked to Target or BK some days and there’s an interesting mall (The Source) on Orangethorpe.
Also, Buena Park has three Anaheim Regional Transportation stops although they discontinued all fixed route service to Buena Park in favor of on demand service. I’ve personally been on rides alone or just two of us. The stops in Buena Park are in front of the Knott’s Berry Farm employment center, Beach St at El Capitan (across the street from Medieval Times), and in front of the Fairfield Inn. That might be useful if someone sleeps in. Buses might not always be available though during some times. I’m trying to do it now and can’t find any available service. I can always request a ride (between two points in their service area) even from hundreds of miles away.