Surviving in such a situation is no easy feat. You need to be very cautious. Firstly, don't draw attention to yourself. Avoid the main thoroughfares where the fighting is likely to be more intense. Try to find a safe haven, perhaps in a maintenance shed. You can also try to communicate with the factions, if they are reasonable, to find a way to co - exist peacefully. If not, you'll have to rely on your wits and the resources available in the park, like using abandoned carts as barricades and getting food from vending machines.
To survive, you should first assess the situation. See which areas the warring factions are mainly concentrated in. Then, look for places with good cover, such as the tunnels beneath the park. Try to scavenge for food and water from the park's restaurants. Also, try to avoid being seen as much as possible. If you can, form an alliance with some of the more neutral people in the park, like some of the janitorial staff who just want to keep the peace.
It would be terrifying. The warring factions might be fighting over resources or territory within the park. You'd constantly be on edge, trying to avoid getting caught in their crossfire. Maybe there are different groups of park employees who have some sort of dispute, and now the magic of Disneyland has turned into a battleground. There could be chaos everywhere, with rides being damaged and the usual happy atmosphere completely destroyed.
Stay quiet. Noise might attract whatever is causing the horror. Try to blend into the environment and not draw attention to yourself.
GTLive might need to find some sort of weapon or tool to defend themselves. It could be something as simple as a broken piece of wood or a flashlight to blind any attackers. Also, they should try to stay in well - lit areas as much as possible since the unknown often lurks in the dark. They could also try to communicate with any other potential survivors, if there are any, and work together to face the horror.
You'd need to be resourceful. Use whatever tools are on the ship to create weapons or traps. For example, if there are some electrical components, you could rig up a stun device. Also, try to figure out the alien's weaknesses. If it's sensitive to light, use the ship's lighting system to your advantage. Try to stay calm and think rationally, because panicking will only make things worse. You should also ration your food and water supplies carefully so you can last as long as possible.
They could try to focus on the non - Twilight - specific elements. For example, if there are beautiful sceneries described in the fanfiction, they can just enjoy those.
Maybe they were able to find some tools in the cabin to try and break out or repair whatever was trapping them. For example, if it was a broken door, they could use a hammer and nails to fix it. Also, they could use blankets or curtains to keep warm if there was no heating system.
To survive, you need to blend in. Act according to the social norms of the novel world. Don't draw too much attention to yourself as a 'good for nothing' at first. Find a basic job or task that you can do to earn a living, like working in a tavern or helping on a farm. This will keep you fed and sheltered while you figure out your long - term plan.
They could use their charm. Sometimes, being a good - for - nothing doesn't mean being completely useless. If they can charm other characters, they might get protection or help.
Stay close to the Avengers. They are experienced in dealing with threats. And try to learn some basic combat skills from them.
One way to survive would be to make powerful allies. For example, befriending a powerful vampire like Klaus could offer protection. Since he's one of the most powerful vampires in the Vampire Diaries universe, his protection would be valuable.