The house is lovely and warm, tshirts will do indoors. The floors are warm so no need for house shoes, but you might want some kind of flipflops for walking to and from the hot tub, but those are not absolutely necessary.

There were at least some clotheshangers in the master bedroom. There was one small and one big towel for everybody, but we really should figure out a way to mark them somehow as it soon became impossible to remember whose identical looking towel was hanging where. :D