You can. Just went on a mystery island tour earlier today and found some acorns there from the non-cedar trees (no cedars on that particular island). You just have to shake a bunch of times. You'll get way more branches than acorns/pine cones.
I created a second resident because I wanted a permanent tent on my island. I want to be able to unlock the nook miles hairstyles for my new resident, but it seems like i can't buy those nook miles hairstyles unless I upgrade that resident's tent into a house, right?
lily and flurry always talk about having a book club/tea time under the stars, so i created an area for them right outside of lily's house! it's one of my favorite spots 💙
i think the only times i've felt especially awkward are when the other party doesn't speak much because they want to get through the trade quickly. there's no problem with that in of itself, i totally get it, but it does make me feel awkward since i always like to at least say hi and thank you...
Not counting the campsite reset trick I did to get Raymond, the "best" campsite villager I've gotten was Skye. The campsite in New Horizons isn't kind to me lol.
for now I can't see myself changing things per season, but i do think i'll be replacing some bushes throughout my island so that i have at least some bushes in bloom every time bush seasons change! other than that, i'll probably just change up the piles of leaves i have laying around.