I live about 5 miles from Lehmans so I'm pretty familiar with the area. :-). On Thursdays, the Kidron Auction is right next to Lehmans. It has been in existence for many, many years. The local folks bring their livestock to sell. Just a local spot.
If you're in the Dalton/Kidron area, you may want to visit the P Graham Dunn facility right on Route 30. The Lone Star Quilt Shop is located in Mt Hope and is a lovely quilt shop. (Mrs. Yoder's in Mt Hope is a good place to eat).
Walnut Creek has Coblentz Chocolates and Der Dutchman restaurant (chicken is delicious). Rebecca's Bistro is also a fun place to eat.
Charm has Millers Fabric which a great fabric place as well as Keim Lumber which is a great place the guys can browse. They actually have a lot of variety for everyone and is quite large.
Of course there's Berlin and Sugarcreek. Lots of little shops to visit.
Hope you enjoy your visit to the area.