Disneyland Monorail

If flying to Anaheim is your plan, the closest airport is John Wayne (SNA). You can also fly into LAX, but keep in mind that LAX is 35 miles away versus John Wayne which is only 14 miles away.

Naturally, your Uber/Lyft/taxi bill will be significantly higher coming from LAX, and traffic will also be more of an issue depending on when you're traveling. 

If you are planning on driving to the resort, you can simply head directly to the Disneyland Hotel:

1150 West Magic Way

Anaheim, CA 92802

Self-parking is available for hotel guests for a fee of $20/night, while valet parking is set at $30/day with in/out privileges.

If the train is more your style, you can look at the routes available through Amtrak. Once you get to the Anaheim station, Anaheim Resort Transit provides shuttle service directly to Disneyland Resort via Anaheim Resort Transit Route 15.