What are some tips for someone PCSing to Camp Walker, South Korea, when married and unaccompanied?

There are many .mil sites that contain all the information you're looking for, so instead of reposting it here, I'll point you in their direction (one tip I will give you is that you want to think of "Camp Walker" and "USAG Daegu" (U.S. Army Garrison Daegu) as terms often used interchangeably).

• Military OneSource's page on USAG Daegu - https://installations.militaryonesource.mil/in-depth-overview/usag-daegu - Lots of background and 'things you should know before coming here'
• USFK's official site - https://www.usfk.mil/ - This will basically give you anything and everything you wanted to know (or didn't want to know) regarding US Forces getting to, staying in, and leaving South Korea ** Make sure you look over this site, ESPECIALLY those listed under the 'resource' tab).
• 2ID "Newcomers: Before you depart for Korea" - https://www.2id.korea.army.mil/Newcomers/Before-You-Depart/ - While not specifically applicable to you, it also has a list of "before you come here, read this" items.

(Specific to your family and you traveling overseas unaccompanied, there are a lot of considerations you'll want to address before you depart.

• BAH Considerations and options for your family - https://www.pcsgrades.com/cms/blog/unaccompanied/
• Overview and things you should know - https://mymilitarybenefits.com/benefits/pcs-season-5-things-to-know-about-unaccompanied-tours/
• Cheap option for your family to come visit - https://www.poppinsmoke.com/space-a-flights/space-a-without-sponsor/

And of course, AR 55-46 (Travel Overseas) - https://armypubs.army.mil/epubs/DR_pubs/DR_a/ARN30921-AR_55-46-000-WEB-1.pdf

Regarding "tips for the area" (I assume that means 'touristy things to do while I'm there') you can easily find a lot of different sites regarding opinions on what the "must do" things are while you're there and 'things to know when off-base'.

https://ling-app.com/ko/things-to-know-before-going-to-korea/
https://www.roughguides.com/articles/best-things-to-do-in-south-korea/
https://www.torntackies.com/korea-packing-list/
https://tourscanner.com/blog/things-to-do-in-seoul/
etc.