Signs?

I’d do a bar menu and maybe a welcome sign

^ agree. Bar sign and welcome sign would be good. For the bar sign maybe just list vodka, tequila instead of the specific names of the liquor unless there’s a short list.

We’re mostly anti-sign because there comes a point where guests ignore them because of the information overload.

Definitely have a sign at the bar listing options. Be as detailed as you can. That way they know what is available instead of trying to guess. I definitely appreciate knowing the types/brands of alcohol as well as what mixers are available. No one in our circles drinks beer or wine so if the other options are not listed, then we would be wondering what sodas are available.
While it doesn’t apply to all, if you are having a buffet, please have cards in front of each dish listing what it is as well as any potential allergens.
You don’t need a welcome sign because guests know who you are and where they are. Same for unplugged ceremony. Have the officiant make an announcement and list it in your programs if you are having those. The guest book and cards/gift table can be combined but not necessary unless the guest book is complicated. . A sign isn’t necessary for escort cards, but may be helpful if other guests are not used to it.