Memorial weekend: camping at fire island

We went to fire  Otis Pike Fire Island High Dune Wilderness for camping on memorial weekend. It's the first camp after we got our tent (REI quarter dome T2). Actually it became a really memorable one( not in a good way>"<)
We called the fire island wilderness visitor center before we came. They told us we can get the permit there. The permit is free and is first come first serve basis. They give limited amount of permit everyday. They don't recommend  us go on memorial weekend since a lot of people will be there. However we still took a chance and went there on Saturday morning at 10 am to see if we still can get in. Luckily we did~The ranger told us people usually went there on Friday during the long weekend. 

We started our hike at fire island wilderness visitor center which is next to the smith point beach. We need to walk down the beach about 3 miles before we can pick a place to camp. On the way we passed the clothing optional beach and piping plover nesting area. The scenery on the way is pretty. Dunes are covered by the green. Seagull and piping plover walk on the beach. We hiked to the place we can camp at 1 pm and it's till early so we decided to hike all the way to the other side of the wildness area, Watch hill visitor center( which is only accessible by boat or ferry)

My backpack looks huge on me:)

We started setting up the tent at 4 pm. We found a perfect spot between two big dunes, which block the wind. I was really impressed by how quick to set a tent (10 mins). The pole clips designed make the assembling really easy even for the beginner.
Chief Will started cooking the meal for us. The stove is beverage can stove made by Will. It is ultra light weight. It's made from aluminum can and burn the alcohol( we steal the methanol from the Lab :P). The dinner is instant noodle and dehydrated beef pasta which is super delicious. 

Chief Will is preparing the dinner

Next morning, we waked up at 5 am to see the sunrise. We didn't see anything since it's cloudy:( . When we went back to the tent, we saw a ticks on the mash outside our tent. It's a dog tick. We guess it got on our backpack yesterday when We tried to hike deeper into the interior of the wilderness around 5 mins. 
After the ticks, bad things keep happening. I started feeling dizzy and headache. I took one . I throw up after i took it. At that moment i still think it's only the serious headache like i had before.  Will asked me to take a nap inside the tent and hoped i can feel better. However, The headache became stronger. We started heading back at 10am. I just kept vomiting. At that moment, we found it may be heatstroke. I become waker and waker and Will carried all the staff we brought. i kept vomiting and the water went out become yellow. We hiked 5 miles back to the visitor center. The ranger said i should call them and they can give me a ride. I guessed i got the heatstroke since i stopped drinking water at 9 pm last night since i don't want to pee at night.