Hi Pam,
Since you are going straight to your hotel which is on Harbor, you would make a left at the top of the Harbor Drive offramp, then the Anaheim Suites is just a little ways down. You would need to be out of the car pool lanes to use this exit. Try exiting them after you pass the Rt 22 Interchange, you may not even need them, traffic shouldn't be that bad.
If you choose to drive into the park from the hotel, you can just follow the signs from there, it will take you through the Disney property and u-turns you into the parking structure. If that way is crowded take Harbor Drive down to Ball and make a left there and another left 2 lights down into the structure.
Since you are staying so close though, you could always walk or I'm sure the hotel has shuttles which is nice at the end of the day, when the feet are aching!
Enjoy!