Yes you can .
I'm new so I'm learning
The monorail does not go to any of the 3 Disney hotels. You can ride the monorail between Downtown Disney and Tomorrowland with a valid Disneyland park ticket.
You can ride the monorail with park admission. You can also enjoy most of the hotel (except pool) without checking in. They have restaurants, bars, and other things to enjoy without checking in.
Maybe you come actually I cant give you the best advice
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