Apache locationmatch negative regex

I'm trying to expose a location through Apache. Normally, I have this block in my vhost that says

<Location />
    AuthType Basic
    AuthUserFile /web/.htpasswd
    AuthName "Test Site"
    Require valid-user
</Location>

This works just fine – everything served up requires a valid user. Now I want to expose a service that doesn't require authentication so I'm looking for a way to make all locations except for /services require authentication. I've been playing with LocationMatch, but I'm not entirely clear on what it's doing.

<LocationMatch ^/(?!services)[^.]*$>
AuthType Basic
...
</LocationMatch>

Allows /services and everything beneath it to skip the LocationMatch, but it has the side-effect of allowing example.com/.somefile to bypass the LocationMatch block.

Additionally, when I tried

<LocationMatch ^/(?!services)>
AuthType Basic
...
</LocationMatch>

everything (including /services) is matched by the LocationMatch.

I'd appreciate if someone could tell me what the [^.]* class does that the second test doesn't and how to expose only /services while keeping all other paths under authentication.