There are plants living in this arid region that are incredibly good at conserving water, and staying alive in the blistering summer heat. The prickly pear cacti we find here are among the finest examples we can find of this. They can store water in their stems (the plate-like green part of the plant) which can be used in times of drought. Their leaves (spines) are small and allow for minimal evaporation, conserving water within the plant. Look around for other plants growing in Dinosaur Provincial Park, and make hypotheses about how they conserve water!
Some things to remember while searching: Dinosaur Provincial Park is home to Prairie Rattlesnakes. These snakes are venomous, but if you avoid long grass and listen for their rattling warning, you are likely to avoid an encounter. There are also Black Widow spiders and Northern Scorpions which call Dinosaur Provincial Park their home. Avoid placing your hands or feet anywhere your eyes haven't been, and you probably won't even see these critters! Finally, after rainfall, the mudstone and sandstone can become very slippery. Searching for geocaches among the hills should be reserved for dry days.
Please remember that you are in a provincial park, and as such, it is your responsibility to ensure you are respecting the natural environment. You can do this by making sure you stay on the designated trails and avoid disturbing plants and animals found here. Additionally, if you find any fossils while in the park, please remember it is against the law to remove or disturb them.
Good luck, and have fun!