I find some of the AD2 add-on percussion instruments very useful for traditional music. Particularly the cajon and the pandeira, which is the nearest thing I've yet found to a "proper" tune-driving tambourine.
The dry vintage kit is very useful as well as is the prog rock kit of all things - it's well balanced and fairly dry.
Ready-made MIDI patterns, not so much. They're built around styles where the band follow the drums rather than the drums/percussion following the melody line as is more usual in European-based traditional music. Though for an "old fashioned" style of drumming march patterns can be worth looking at, just tweak the timing and tempo and simplify or add to the patterns as required.