But if the ONLY option is a VERY expensive, hot, sticky, dirty, smelly set of 'real' buckskins
1) The only option?: no especially for those doing eastern pre-1800. Wool, linen, hemp, linsey woolsey, and even cotton were widely used back when - in fact based on the known historical record more widely used than buckskin. A pair of linen breeches with wool or heavy hemp leggings and a linen hunting shirt would be a good start.
2) Hot, sticky? not if you use brain tan - no more hot than a pair of heavy jeans
3) dirty, smelly: your choice or not - buckskins can be cleaned, especially well smoked braintan. Folks, such as well known tanners Matt Richards and Billy Metcalf, that wear them as everyday clothes, including town wear, often wash them just like regular clothes in the clothes washer and then run them through the drier at no heat to "fluff" them up. See the folks at
www.braintan.com for more info on caring for braintan clothing......
commercial chrome tan is a completely different "animal" and will be hot and sticky - dirty and smelly is again a choice since they can also be cleaned......
as for the oft repeated note re: barrel steel, etc. true but the main reason is economics, if you've got deep pockets than you get one made just like made in 1780. On the other hand things such as clothes can be done on a budget and still be "period".........as you say different strokes, but then again "doing it" as much as possible as our ancestors did it is a way of becoming closer to understanding how they lived.........