Camping in the rain is a popular search as campers are looking for tips and advice on how to help keep things dry during their trip. I have attached a link below where you can read a little more on these useful tips. I would also like like to add a few tips that are not listed on the link.
Don’t camp in low-lying areas, air flow is not the best in low-lying areas. Ventilating a tent is very important if you want a healthy ambiance within the tent. The tent should face the direction of airflow so that it can get the benefits of cross ventilation. Use anti-moisture sprays to stop condensation from building up inside the tent. A large tarp can be set up over your tent. If erected at a slight slant, it will conduct water away from you and toward the ground. This method won’t get in the way of enjoying the open air.
http://www.thecampingguy.com/blog/camping-in-the-rain/#more-39

