Maquoketa Caves is a must visit destination for camping! There are several factors to take into consideration when planning a trip here; due to concerns for wildlife (primarily bats) the caves close frequently, check the park website for details about when they will be open and respect the closures when they occur. In addition, be sure to clean your shoes before and after visiting the park to prevent spreading potentially dangerous fungus to the caves. Overall, the cave network is stunning and a great place for group camping! There are caves for everyone, whether you're claustrophobic and don't want to be in tight spaces or you're willing you army crawl for 1/4 mile. The rangers in the campground can be strict and will mandate that you have only one "camping unit" per site, aka tent, even though the website says sites can hold up to six people. They do check on sites regularly so trying to sneak extra people in isn't a great idea. Even with the cave closures and the strict rules for camping I still go every year, hope to see you there!