We had a great stay at the caboose! It was both fun for us and our daughter to be in a real train car. There were fluffy towels, some soap and shampoo, kitchen basics like salt and pepper and a few good pans and serrated knives for cooking. Our toddler loved the big shop across the from the caboose where there were all kinds of heavy machinery -- new and old. :)
Quick note on sleeping configuration -- there's a single bed with a trundle, and a lofted double bed. If you are staying with kids and they are climbers, you might have trouble keeping them off the ladder to the lofted bed in the night (the ladder is shown on the right in the picture with the kitchen). This worked out OK for us, but you might want to bring a pack-n-play for a smaller kid to keep them contained if it's a concern.
Thanks again to Sam and Pat for their hospitality!