Keeping mice out/away of racecar trailer

I wouldn't recommend you using mice traps and poison. Mice that got in a trap attract other mice. They send some sort of call help. You might get rid of one, but dozens will come to rescue it. There is another issue with the poison for rodents. If they survive after eating the poison, they gain immunity against it. Besides, they keep eating and running around your food, spreading this poison. You might accidentally eat some of it, and it is too dangerous. Sometimes, it might even be lethal. I recommend you not to experiment with mice and other rodents and call for pest control service. You can also check these guys —brightpestcontrol.com.au. They helped me to get rid of mice at my house.