It is not possible to be infected with the same type of HSV more than once, so if you and your girlfriend both have HSV-1, regardless of where, then you cannot get it again in another location.
The only time that someone may have outbreaks in more than one place is if, during their first outbreak (Primary Outbreak), they touched the area of the outbreak and then touched another part of their body. There is a potential for the virus to be passed between locations at this time because the body may not have had a chance to develop enough antibodies to prevent a second effected site.
Since you are both aware of your HSV-1 status you have obviously had the virus and therefore the antibodies for a while and would not be able to re-infect one another.
As far as unprotected sex goes, if you have both been tested for other STI’s and neither of you is having sex with anyone else then the two of you can decide if you would like to discontinue condom use.
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