We tipped $5 per day for 5 adults and 2 toddlers in a 2BR at SSR. I used an envelope labeled "Mousekeeping" and while we didn't get any towel animals, we got lots of extra soaps, coffee, etc. Since we paid cash for our ressie, we got daily mousekeeping and when we saw one of the ladies coming in (as we were on our way out one morning), she said "thank you" to us and left some extras. Everyone likes to feel appreciated, esp. mousekeepers!