Hi.
My husband and I have Dland passes and go quite often with our just about to turn 2 year old. It isn't as bad as you might imagine.
What to take:
Your own stroller but bring a bike lock. My sisters stroller was stolen while she was on a ride. Just put the key in your pocket and you'll never have to worry about it going missing.
Pack a locker bag and a take with you bag. We prefer a back pack so that when we lock up the stroller, we strap on the pack and our stuff is with us.
Pack light. You really only need day time clothes and some warm jackets and maybe light blankets for the little ones at night. I suggest bringing a spare change of clothes in the car. I've had my daughter spill something and soak herself and had nothing to change into...not even in the car. You will have to park in a parking structure in a land far, far away and travel by tram to the park but at least it will be there if you need it. Parking is $11 bucks.
Pack a lunch. You can put it in the lockers. They have some inside the park half way down on Main Street to the right behind a fruit stand and they have some out in front of the park before you go in to the left. Lunch can be WAY overpriced there and you may want to save a few bucks for churros which are $3 a pop. There are tables by the inside lockers but if you want to rest, I'd do the outside lockers.
Rides:
There are tons of rides they can go on. In Disneyland: Disneyland Railroad, Autopia, Monorail, Alice in Wonderland, Casey Jr. Circus Train, Dumbo the flying Elephant, It's a Small World, King Arthur Carrousel, Mad Tea Party (I think), Mr. toad's Wild Ride (although this does have a "going to Hell" scene from the story so I usually skip it), Peter Pan's Flight (really worth the wait for sure and my favorite), Pinocchio's Daring Journey (slightly scary scene from the story), Snow White's Scary Adventures (scary being the key word because of the witch), Storybook Land Canal Boats (goes into the mouth of the whale), Mark Twain Riverboat, Saling Ship Columbia, Tom Sawyer Island (by raft with caves but that could be a handful for you and I haven't done it yet), Tiki Room (featuring a singing bird show), Jungle Cruise, Tarzan's Treehouse, The Haunted Mansion (mostly not scary but a few parts like ghost ride with your in the ride and pop ups), Pirates of the Caribbean (dark drops but small and quick), Winnie the Pooh, In Toontown there are things to see but the rides are by height so you'll have to see when you get there for the 3 year old.
In California Adventure there is: A Bugs land. It's just like A Bugs Life and there are 4 rides...I think...in there that they can go on. There is a A Bug's Life 3d show...kind of scary but my daughter did okay. They have a cool parade that you must see with tons of disney characters. King Tritons Carousel and the Sun Wheel are cool. If you want a cool experience for your daughter, make reservations at Ariels Grotto ###-###-####)All 5 princess come out to you at your table and meet and take pictures with you. The cost is a set price per plate but I can't recall the amount. It's like a dinner theatre...you pick from a few choices and pay the same price...desert is included. Bring an autograph book too. They have old fashioned style carnival games to win stuffed animals too. It's beautiful there. Oh and they have a Redwood Creek Challenge Trail with bridges and mazes. Fun.
Don't make the whole day about rides though. For kids that age, it's more about what they see so pick a few musts and enjoy the time together. Most of the kids rides are very short so waiting isn't too difficult.
Here's Disneylands Website too just in case I didn't bore you enough with my novel. Really, I don't work for them. LOL
http://disneyland.disney.go.com/disneyland/en_US/parks/la...