I get very nervous at Disneyland when it's hot and crowded. I feel "trapped". But I want to enjoy it. Which benzo would work best for this? Xanax (alprazolam)?

Anxiety. Anxiety is a symptom that might correspond to different diagnostic conditions. Therefore, your question about Xanax (alprazolam) is very difficult to answer. If after an evaluation you report similar symptoms in crowded, open places, the diagnosis of agoraphobia could be appropriate. After that, there are medication as well as behavioral options to address the problem. I suggest to consult with your doctor.