Pop-up campers have several disadvantages when compared to other types of RVs. First, they are more difficult to set up and take down than travel trailers or fifth wheels. This can be a serious problem if you plan on camping in an area with bad weather conditions. Secondly, pop-ups often leak, especially around the seams where the walls join together. This can lead to water damage inside the camper and cause mold and mildew to grow. Finally, pop-ups are not as durable as travel trailers or fifth wheels and are more likely to suffer damages from high winds or heavy rains.