Mummy of 4 - yup chuck everything in bucket. Only thing I rinse is the poo ones to get the poo off first.

Wash them all in together - flats, MCNs, wipes etc.

Dunno how many you need - its a hard one to answer. Depends on weather where you are, how often you wash, how many in cloth etc etc. I have around 15 MCN's I think and its definitely not enough for 2 in cloth.

Can't answer the itti question - I only had D'lish here.

You can use flats without a cover, just be mindful if you put him down on anything and he does a big wee, whatever he is on will get damp.. lol