, Yes on the bouncy seat, if you ever want to go to the bathroom or take a shower, especially.
Definitely get a bouncy seat. There are some things that are totally unnecessary from my experience (like a Bumbo seat, for instance) but bouncy seats are great to have on hand and much more versatile than a cradle or crib or something like that.
As for the going home outfit, it depends. 0-3 months is considerably bigger than Newborn-sized clothing in most cases. If you or your partner were bigger than 7 pounds at birth, then there's a chance your baby will be bigger than 7 pounds at birth too, in which case 0-3 months may very well work fine.
If you were a smaller babe, then you might want to go with Newborn-sized instead. We had a 0-3 month outfit for Guinevere and she was 6lbs, 6oz, and it swallowed her whole. Looked ridiculous, really. Thankfully it was warm out where we live at the time, so no big deal. I was very glad I had brought newborn hats though, as the hat that came with the outfit wouldn't remotely stay put.
This time I'm going for absolute warmth and comfort. I'm bringing two different outfits.
This one in case it's super cold (it's very soft fleece on the outside, soft combed cotton on the inside, and very fluffy/padded/warm):Warm outfit
And long gowns to layer with soft combed cotton pants, and long-sleeved side-snap tshirts for underneath the gown, hats, mittens, socks, etc., for if the weather isn't quite as cold. I am not big on the whole fancy lace and whatnot for a Going Home Outfit. I want new baby to be warm and comfortable. She will be sleeping the whole way home anyway, more than likely. So layers are good for where I live since the weather is unpredictable in Feb. It might be 70. It might be 20.
Regardless, I'm bringing Newborn-sized (plus a few preemie sized things I have on hand from Guinevere's first few days), just in case. No 0-3 month stuff at all.
I will probably bring more clothes for the baby than for me, honestly.
If I lived in AK, I would definitely put her in lots of layers and have a nice warm bunting type outfit that would still be safe for a carseat -- but also bring a very warm blanket to tuck around her once she's strapped into her carseat.
Don't remember if I posted about the gallbladder thing or not, but there were no gallstones -- only "sludge" (niiiiiiiice), and they said it could be causing issues with me digesting fatty foods. My doula (love her!) told me to start drinking unfiltered apple juice, and to take digestive enzymes prior to eating fatty foods.
She also helped me edit some of my birth plan, thank goodness. It still has a long way to go before I'm comfy with it, but I'm feeling better now.