Brandy, I've been where you are, and I bet a bunch more around here have, too. It's easy to be super excited when we're planning the trip, because it's so far off, that we can't imagine anything going wrong. The weather
should be fine. We'll be careful to
not get sick. The crowds
should be manageable. Etc.... As we get close, the realization starts setting in that things can and probably will go unexpectedly. It's a fact of life. The trick is to remember it's our frame of mind that determines how great a time we will or won't have. Life is what
you make it.
I suggest you get a lot of rest before you leave, and make sure you get plenty of rest while you're there as well. A rested body can do wonders for the mind. Plan for a few things to go wrong, and decide on some solutions before you get there. Be confident that you will be able to handle some of the unexpected's. You've got a couple of little ones that will need a bit of extra attention from you, since they won't be able to go on as many rides as your 5 yr old. Plan for some character greetings or other activities close by the ride your 5 yr old and other parent goes on. There are lots of diversions, such as Ariels Grotto, etc...Plan to take your 5 month old out of the stroller every time you stop, so you can try to have her in the stroller while your walking. My children were and still are little heaters, and I wouldn't want to carry them next to me on a hot day for long periods of time. Above all, split the hard stuff with your husband!!!!
As for the love bugs. There are definately more outside the parks than inside. My daughter HATES bugs, and is even afraid of those little black sugar ants

. She was, however, intrigued by the love bugs. You might want to try not making a big deal about avoiding them, and in fact search them out to watch them, while their '
snuggling'!
Remember, as another poster stated, enjoy each moment while you're there. Pay attention to those moments, and appreciate the magic that especially your 5 yr old will absorb. Try to see it through his eyes. You
WILL have great time, because
YOU want to have a great time. That's all there is to it. Oh, and
Now, go and have a blast, and don't forget to report back on how fabulous it was!
