I didn't say they lash out violently at others, I said a meltdown (not lash out) can involve hitting and kicking which I wouldn't put/leave them in the position to be doing in a way that could hurt themselves or others.
While coprolalia is covered under ADA, I also never said my children curse, I said they can use taboo words and phrases. Not that it matters. Would you have your child with coprolalia literally never leave the house to go in stores, religious houses, school, the park, or other places in life for their first 20-odd years or more? Recreation and public access are human rights.
You did say that you are physically disabled, and had to be in an electric wheelchair, and that dad was unable to help. Therefore, I was under the impression that, in the absence of other adult helpers, there would be nobody to stop the children from hitting, kicking, throwing thing, or whatever was going on at the moment.
I wouldn't expect children to be locked down for 20 years or for any amount of time, but certainly kept out of situations that that exasperate their disabilities.
My own son has ASD and we didn't do Disney from the time he was 3 months old until he was 11, and was able to self regulate enough to handle it, and it would be more fun than nightmare for him. We did many vacations, but I was cautious about making sure they were as low stress as possible, and judged by what was appropriate for him at any given time. Just a change of routine and familiar places was stressful for him, so sure didn't want to add crowds, waiting, exhaustion, and extreme stimuli to that.
I still don't understand why you chose Fort Wilderness with one child with environmental allergies and another with insect anaphylaxis. With everything else you will be dealing with at Disney, this just seems like it could really put things over the edge. Is it the familiarity of the camper for the ASD child? I can understand it from that standpoint, but rigid diligence will be needed for the children with allergies. Keep in mind that it's against the rules to spray your site with anything. But nothing keeping you from spraying down the outside of your camper.
I know you think I'm being rude and not understanding. True, I don't understand your daily life or some of the disabilities you deal with. Even so, I would love nothing more than Disney to be accessible to your children, I'm just trying to be honest about what I hope would not be a giant waste of money for your family.
You seem to have been to quite a few other amusement parks, so perhaps this will go better than what your original post seems to indicate. I hope so.