You can easily skip the Golden books unless you're a Voyager completist. I can't remember anything story wise in the first four books that's even mentioned again later on.
Actually the first half of Full Circle
is spent wrapping up B'Elanna and Tom's story arc and other unresolved threads from the Golden novels, and it has ongoing ramifications for B'Elanna and Tom in subsequent books.
Man, I don't remember a B'Elanna/Tom arc in the Golden novels at all. I remember stuff like something with
or what ever that was. I was thinking Full Circle picked up from that hint in A Singular Destiny with Full Circle being split with the first half of it taking place before ASD and the second half taking place after or something like that.