Haven't been to the Lancaster MLRA Show but the Lewisburg 18th Century Artisan show not only was muzzleloader stuff but a variety craft items, American Folk art, quilts, jewelry, tin ware, paintings, leather crafts, furniture etc etc. The Mrs even enjoyed.
LMLRA is not just muzzleloader specific, but a decent selection of muzzleloading stuff, as well as war memorabilia (WWI, WW2,etc.).
The 18th Century Artisans Show in Lewisburg is "period centric", as in they have guns of the period, but also tools, furnishings and raw materials (horns, parts and kits to build rifles/smoothies and pistols). They also have a room with original rifles, pistols and smoothbores. Here is the link to their web site. Check out the photos to get an idea of what the Show entails. https://www.18thcenturyartisanshow.com/