General consensus seems to go with the flooring strips that are similar to the laminate you were mentioning, but hey are vinyl, so not effected by the stuff that always gets brought into an RV when out camping. Easy to clean, and water proof. I believe it's called "Allure" at Home Depot, and runs about $2/sqft. in a variety of wood-tones.
Carpet tiles would probably work nice, but again, they get dirty pretty quickly.
The slide may pose a bit of a problem, but if you search, you can probably find others who have already done it, and I'm sure would be happy to help you.