Re: Will infrequently sleeping thru the night reduce supply?
most likely, your supply isn't fully in yet (around 6 weeks), and won't fully regulate until 3-4 months. so what you do now does have long-term effects. if you are nursing on demand around the clock, then baby sleeping 6-7 hours at once is ok. you might want to pump to relieve engorgement, and also know that he won't sleep like that very long/often but go wtih your gut and use your judgment. you don't want to become so engorged you risk plugs or mastitis, but sleep is very important to a healthy mama, too.
there is really no reason to give a bottle to "get him used" to a bottle; if and when your baby needs a bottle, you can address that. lots of families like to have dad give a bottle for bonding, though this is also not necessary - there are lots of ways dads can bond besides bottles! the concern is that, particularly before 6 weeks, babies can develop a flow preference very quickly and without warning, and dealing with that can be a huge task. not every baby will have this problem, but it's a risk. same thing with the pumping: you're establishing long-term supply now, so if you're always producing more than what your baby needs in a day (full nursing + pumping for stash) then you're probably ok skipping pumping when baby gets 1-2 oz at night. but each mama's supply is going to be a little different, and some people are much more sensitive to the supply/demand equation than others, and some peoples' supplies are more fragile or robust.
around 3-4 months when your supply regulates, here are some things that do NOT indicate a low supply: not feeling full or engorged anymore; not leaking anymore; not feeling letdown; not pumping a ton (avg in addition to nursing is 1-2 oz for a pump; replacement pump 3-4 oz). mommal has a full list, maybe she'll come by and post it. as long as you continue to nurse on demand, and you don't start a hormonal contraceptive and aren't pregnant, you will continue to have enough milk.
Nursing, pumping, cloth-diapering, babywearing, working professor mama with the awesomest SAHD ever.