Hi Whitt! Welcome to the forum, and welcome to the world of Camp Inn. I was EXACTLY in your shoes last year - I rented the Camp Inn 560 Raindrop to see what it was all about.
The showers and bath house are perfectly fine by campground standards - clean interior, plenty of counter space to spread out toiletries at the sink area, outlets to plug in razors. The showers each have their own private changing area that is separate from the actual shower. There were hooks as well as benches in the ones that I used last year. They were as clean as you might want them to be, but I always use flip flops myself anyway.
Two things to keep in mind:
1) The showers take quarters to operate. This was a new experience for me as Michigan county and state campgrounds have "free" showers. I can't remember how much time each quarter buys. I do remember initially making it a personal challenge to complete my shower in one quarter's time. I succeeded, but then the next day decided to whoop it up big time and allow myself TWO quarters for my shower.
2) The road I had to walk to between my campsite and the shower house was a dirt road with much loose sandy soil. If I wore flip-flops or my Keenes, I always seemed to kick a cloud of dust onto my damp feet. By the time I reached my campsite, I pretty much had to re-wash my feet. I tried alternative routes back to my campsite, and then finally (like #1 above) gave in to the situation and just re-washed my feet back at my trailer with the sink's spray hose pulled out to full length.
Have fun - I look forward to meeting you.