I use to only stay on property (for many years), and have since branched out to other hotels/motels around Harbor. Out of all of them I have tried (and that would be many at this point) we like the Hilton Double Tree on Harbor the best. We also tried the one in Orange, but that one is not as good. The only other hotel that compares to it is the Hyatt Orange County (also on Harbor, but with private shuttle). It was just as nice as the Doubletree (if not nicer) but also smaller for us and breakfast was a problem. We get the free breakfast buffet at the Doubletree because my husband is a diamond member, and at the Hyatt did not have this option. The only issue I ever had with the Doubletree is that you have to take ART (Anaheim Rapid Transit) if you want to take a shuttle to
Disneyland. I hate ART with a passion. It is slow and unreliable. It will get you there, but it isn't to be counted on like the paid shuttle at the Hyatt OC.
The Doubletree Hilton has suites which are nice for a bigger family. It is clean, comfortable, and a real "hotel"--not a "motel". It is quiet and if you want to sleep in your can. You cannot hear children screaming bloody murder in the mornings there, which is a bonus over many of the "motels" on Harbor. Nice beds with real down comforters and lots of pillows and all around sanitary conditions.
You will not be disappointed with it. Look up the reviews on Trip Advisor--there are many good reviews of the Doubletree Suites.