I think this chapter is less about eating and bath time hi-jinks, than trying to relax among friends for possibly the last time. At this point Frodo’s friends are bringing him comfort physically as well as mentally. And after all who wouldn’t sing at the prospect of a hot bath after two days stomping around being chased by those sinister riders. I know that I have been quite overcome with joy to find a brimming tub of hot water after ‘roughing it’, and probably sounded rather giddy too!
But the points I ponder most are: the dream, the description of where the house at Crickhollow is (it echoes Frodo's internal transition) and Merry’s vast organizational abilities!