More that I'd rather not be up against something that can reduce me to a colorful smear on a cave wall if I piss it off because I'm tired and going to make mistakes. Not to mention getting lost like an idiot looking for one, or stumbling into a terapede nest, or whatever.
Now, if you and River have been napping all day while I've been prepping the spells I need to bring something that size down alive, then be my guest. Me? I'm going to do this right.