The hands down best tools are going to be a solid walking stick, a pair of secateurs and a leather glove. In fact, if you can't do the trimming with a 3" pocket knife and snap cuts, then the secateurs are very good. They will cut thicker material with less energy, in tighter spaces, more neatly than any swung blade. They aren't super light, but they are no heavier than a six or seven inch knife, but require no subterfuge or justifications.
I have been on walks where I have had side by side comparison of secateurs vs blades and I hate to say that the garden pruners were the more sensible choice. My mum (now 71) uses the secateurs and I have used four and six inch blades and an 18" bladed parang. I like the blades, but they require a lot more movement to use and over the course of a walk they were not more effective. For clearing an area of nettles and brambles, sure, the 18" blade won hands down, but then one is out to clear paths and not walk along them.
The gardening/agriculture bladed tools would not need much explanation if the paths were really over grown, but they tend to be rather heavy and bulky and are more appropriate for going to clear paths rather than going for a walk and just trimming the odd bit of greenery.