I suppose I'm a 'new walker' so I wouldn't really know what's busy and what isn't, but I've done two or three local walks the past week or two; up, over and around small hills (one felt like a mountain!
) and have met a couple of people on each occasion.
This is in a popular rambling area with quite a few trails skirting the northern (Carrick) end of the Galloway Forest, so I wouldn't say that it was too busy. Might not be all that busy an area though.