Thanks. I've been there many times and the rides don't bother me--it's the people, the constant stimulation, the memories that trigger different compulsions--this return trip is to conquer all that.
And yes, I'll be loading up on Purell and Klonopin!
(If you're flying, remember you can only take 3 oz. or less bottles of Purell that fit in a quart-size Ziploc in your carry-on bag. The 2.2 oz. bottles are handy for this. You should be able to find them at Bed, Bath, & Beyond in the travel items section, if not at your local drug store.)
Let the ppl you go with know your triggers, if you know them, and be able to watch out for your compulsions so they can alert you to them and help you with them. My OCD isn't triggered by memories, it is just a daily life thing, so I don't have much other advice.
I don't know what kind of anxiety you have, but I have Social Anxiety so know how it feels with crowds. I also have Sensory Processing Disorder (amoung other things), so know how the stimulation problem is, too. Remind yourself that it is okay if you need to leave a line or attraction (if possible) to get away if you really need it. Your health comes first! But, if you are able to deal with it well enough to stay, you might be able to have a good time despite the problems.
You might want to bring things with you that will distract you from your settings - a stress ball (one of those rubber/foam things you squeeze), a small furry stuffed animal (i.e. a pocket-sized one) [or you could walk around with a Pal Mickey and not stick out of the crowd], noise-cancelling headphones or earplugs, sunglasses, a pocket-sized book of word puzzles (you can find these at the grocery check-out counter), etc.
Keep reminding yourself you're in the "Happiest Place on Earth!"
And don't get mad if you can't face all your problems or fears. It is about baby steps (just don't bring a goldfish in a jar around your neck with you, LOL!!!).