On Tours, camping, away from home for weeks, several options go with me.

I bring a long cable, with loops on the end,
to attach the bike to stuff bigger than sign-posts,
like trees and picnic benches.
you can find plastic coated cable at hardware stores, and an end piece,
to form a permanent loop, by closing with a hammer.

Frame mounted ring locks are great! AXA & Abus both make some.
it goes around the back wheel.. so a quick lock to prevent roll off at cafes.

Have used an armored cable Lock before,tube segments of steel over a cable.
Specialized had one that coiled up small so I made a mod to the bracket,
and put it suspended from the top tube, so as to not lose a bottle cage..

recent buy, an On guard version, not so easy to coil up, so I hang it from my handlebars,,
And an Abus link lock, 6 hinged segments fold up and go into a pouch,
that fits to the frame, so easy to stow, out in the open, to always be handy..

they range in price, .. 20 to 200$

so a combination of stuff, is good. a convenient lock, and a long cable,
or 2 shorter ones since you can link eyelets,
combine to keep things that go bump in the night, to not be someone nicking your ride.