I pretty much do not dip beaks, with any quantity of chicks.
I just put glass marbles in the water the first few days, the chicks peck the shiny things and get their beaks wet, and of course they all learn from each other too.
I do occasionally dip a beak if I think a chick is struggling, but for most chicks that have been shipped I think it is more helpful them under the heat quickly, rather than having most of them sit in the box while you take them out one by one and dip beaks.
I've dealt with chick numbers ranging from about 6 up to over a hundred. I do not know if you would have to do anything different with a very small number, but among any group of 6 there seem to be enough that catch on and teach the others.