I'm trying to think if there ever was a path along there... There possibly was, because there's been, for a long time, a path along the north bank of Boggy Creek from Wells Rd towards Carrum. It would make some sense to have it linking onto a path along Wells Rd to head northward. There was never any path along Wells Rd south of Boggy Creek, although the swamp track (er sorry, that would be the Seaford Wetlands Trail) wasn't a long way in from the road, just behind the properties, but didn't go right through to the creek due to that north-eastern corner remaining private property for many years.
Further along, there is some work going on in the Pines. I've only seen what I can see from Ballarto Rd on my commute, but there is a crossing at the eastern foot of the overpass, with a concreted approach on the south (Pines) side, which soon peters out to a gravel path. There seems to be two or three branches to the path; one heading west towards Tamarisk Dve (there was always a bus stop on this stretch, and a short, rough path through to the "estate"), another heading almost straight into the park, and a third heading east just inside the fence, but far enough in for a screening strip of vegetation to be left in place.
Just ride the bloody thing and enjoy yourself!