Travel Kit

So for some of my more adventurous trips, I take my OM1.1 with the 12-40 f2.8 lens, but for more of a leisurely city/touristy destination I’m struggling on what combination I should go for.

I want it light and compact, probably prime lens(tend to shoot 40-50mm, maybe 35mm might be more forgiving) and wondering if I should pair a lens with my existing camera or spring for something lighter as well.