The only thing I can think of are these little mineral gummy bears I found on amazon called concentrace trace mineral gummies. Vitassium makes quick chews too (which can be really helpful when walking a lot). And don't be afraid to sit out an activity in the shade and have a snack if you are feeling run down. I hope you have lots of fun!

I live in Florida - I survive through a lot of water and making sure I'm wearing compression socks. Definitely bring snacks and some ice packs you may have! Disney had a Disability Access Service Card that you may want to look into! I have a friend that works in Guest Relations (where you get the DAS) who also has POTS! You'll be able to go through your symptoms and they'll be able to assist you with the best accommodations there ♥️

∆∆ def has the right idea! also I recommend looking up guides/videos abt Disney, they can give a lot of tips. A good article is this one: https://www.themainstreetmouse.com/2017/08/10/magical-day-disney-pots-guest-blogger-samantha-carver/

Highly highly recommend using a wheelchair. Disney is great for accessibility, and walking around the park is quite frankly an impossible task for me. My wheelchair was my saving grace at Disney. Compression socks, lots of salt and electrolytes. And most importantly, have a great time!!

Water. Lots of water. Compression socks might help, cold food and drinks. Make sure to rest in the shade when you can and take breaks when you are tired. Don't try and push through to please others. Take care of yourself 💕

If you don’t plan on using a wheelchair, I would recommend bringing a collapsible camping stool. This way you can sit down whenever and wherever you need to. I brought mine to drag con and it helped so much. I hope you have a great time! 🤗