Hi Roark -
Welcome to My Swiss Alps. Here is a start. If you tell us about your competence level as a hiker....sounds like you are experienced....we can offer more comments. Also, do you have an itinerary? If you are hiking via SAC huts, they can fill up... reservations are normally required in good hiking season.
Have you hiked in Switzerland before? Or, have you been there? Do you know about die Wanderwege?
The most convenient map store for most travelers through Zürich is the Barth store, one level down from the railhead for tracks 3-18, across from the first set of steps leading to track 2.
This link within the SBB website has station plans for major stations throughout Switzerland:
This map shows a shopping plan, one of a few such maps only for the largest stations:
www.sbb.ch/content/dam /infrastruktur/trafima ge/bahnhofplaene/plan-zuerich-hb-shopping.pdf
Look for location #401, Alfred Barth AG, Buchhandlung.
You'll find topos of various scales, and also die Wanderkarte ( hiking maps) with the the national network of "die Wanderwege" marked in red.
Traditionally, I have used the 1:50,000 for planning and to carry. In mountainous regions and where terrain is dangerous, the 1:25,000 (non-topo) give the best detail. Plan on spending about 20 CHF per quadrangle.
There is smart telephone app on the Swisstopo web site. Mobile phone coverage is almost universal in Switzerland, but there are a few pockets in very remote areas where you may not find service
The web site of SwissTopo...the central map organization of the Federal Land Bureau, is rich with information. Their maps are absolutely the best available. Under "Products" you can see many types of maps.
map.geo.admin.ch/?topic=ech&lang=en&bgLa yer=ch.swisstopo.pixel karte-farbe&layers=ch.bav.ha ltestellen-oev,ch.swisstopo.swiss tlm3d-wanderwege&layers_visi bility=false,true&X=19 6200.00&Y=700700.00&zo om=4
Most of their paper maps are available at stores like Barth.
Barth used to have a huge map and travel book store on the Bahnhofstrasse about a block from the Bahnhof. Gone the way of many bookstores.
The Orell Füssli chain of Bookstores still exits, although their store on the Bahnhofstrasse near Rennweg may not be there anymore, there is one on Füsslistrasse, just off the Bahnhof Strasse.
www.orellfuessli.ch/sh op/home/thalia-filialen/showBundeslan d/zr/
They are good for maps and exist also at many locations in Switzerland. I also routinely use the one near the main station in Luzern.
On your hike you will pass just south of the area described in this link:
Here are some other useful links:
map.wanderland.ch/?lang=de&route=all&bgLa yer=pk&resolution=5&X= 559615&Y=142485&layers =Wanderland
and general information at a basic level here: