Superb finds! I've only found one walker in 15 years!
One suggestion I'd have is to try to avoid polishing the silver coins you find. Most of mine I gently rinse with water to get the dirt off, and then place them for display. Having them as "original" as I can is actually more pleasing than brightening them up. Some I polish though if they're just too ugly after rinsing. Polishing may actually lower the coins' values too.
Keep at it and happy hunting!