domain name system - configure DNS to access local servers using public address

I have a domain and DNS server set up using Windows Server 2012 R2. The local domain is a subdomain of my public one, and I have a forward lookup zone configured for it in my DNS server.

i.e.

local: lan.publicdomainname.com

public: publicdomainname.com

The DNS records for publicdomainname.com are stored with the public DNS on the registrar. (godaddy in this case). lan.publicdomainname.com is not stored with that DNS server.

I have several local servers that are listed on the public DNS as subdomains.

for eample:

server1.publicdomainname.com

server2.publicdomainname.com

These can be accessed using those URLs from outside the local network just fine, but don't work while connected to the LAN.

Should I be adding a new Forward Lookup Zone to my internal DNS server named publicdomainename.com?

edit:

Seems like I should either be using hairpin NAT or split DNS. From what I understand a hairpin NAT causes extra processing to be done on the router for local traffic, and a split DNS requires an extra set of records to manage. for just 3 or 4 servers, which methods is better? Are there canonical guides to set each of these up? (on Windows 2012 and tomato/linux router respectively)

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