My favourite tinder packages so far are:
Clematis down+twiggy bits, wrapped in a bit of birch bark - autumn through to early spring
Lime tree fluff collected and dried, wrapped in birch bark - summer
Both are better if fluffed up rather than compressed although the clematis works better a little more densely packed. Lime fluff seems positively flame-retardant unless very loosely fluffed up - but then is like gunpowder when done right. The birch bark/clematis twigs then take the flame to the next level nicely, letting me go straight to small sticks most of the time.
I haven't tried willowherbs as I only find small varieties in my local area, so collecting enough fluff is not very practical.
Another point is that the peel-y birch varieties are not native as far as I can tell - I find them in ornamental planting but never in the wild. The only native silver birch I've used is from dead trees, where the inner wood had rotted leaving the bark easy to peel off. I cleaned up the inside and dried it well before use. However I have found a range of peely types with qualities ranging from papery coming off in ragged strips, or large sheets, to some where a plate with the consistency similar to lollipop stick could be peeled off without removing the new bark underneath. I think some are North American and others are Himalayan. So although they are an available resource, it would be interesting to find native substitutes.