I agree with those that say, it depends on you when you're ready. It does take extra work to make sure you have a great time. As long as you keep in mind that it will be very different than when you went without kids.
The first time my husband and I went to Disney was our honeymoom. We had a great time. We went a few times after that without kids. When my son was born, we decided to wait just a few months before his 3rd birthday before we went again...my husband and I love Disney and it was difficult to wait, but we thought that was the best thing to do. He loved it. So we went every year since then. However, to be honest, it was a lot easier when we first took him.
Then my daughter was born, we knew we would be able to take her. So at 9 months, we took her for her first trip. She loved it. She is 3 now. And we have started to go twice a year. To be honest, again, it was a lot easier as a baby. She took naps in the stroller, we changed her diapers, she went on some rides. Nothing really scared her. Last year, she started choosing the rides she wanted to go on. Although she still loved them, she was a little more hesitant. On our last vacation, she was still afraid of characters. We found this out when she was almost 2 and we ate at the Cinderella's Royal Table for dinner. By the way, there were no scheduled characters at the dinners so we didn't think much of it. She did have her photo with Cinderella in the front lobby. But she was very nervous and didn't feel like being there too long. By mid dinner, they had brought out the Fairy Godmother (which was not too bad), but as soon as the two Mice came out,

although she was far far from them, she screamed and cried until they left. They came over to say hi and photos with my son, but knew not to go near her.
Anyways, I do believe that it is you that will make it fun as a vacation. If you think that it's easier to wait, I think that's what you should do. I have just found that they were a lot easier as babies. Last vacation, I found myself constantly asking my daughter (almost 3 years old at the time) if she had to go to the potty...she finally told me in her very calm voice..."Mommy, I told you I didn't have to go".

And so, at that point, I think I had been spending my time worrying about her that I wasn't having a good time and she was getting quite annoyed at my constant nagging.

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