The following are words that you may like to use in designing your own "pioneer word search." These were made available from a Laura Ingalls Wilder compilation from PUBYAC 8-26-2009. As to the number of words selected, and the difficulty in vocabulary, I should think it would depend on the age of your guests.  Best of luck.

Bears

Bladder

Braid

Brindle

Bulldog

Bullet Mold

Butchering

Calico

Cameo

Churn

Corncob

Corset

Cracklings

Cradle

Deer Lick

Delaine

Fiddle

Flatiron

Flounce

Griddle

Gunpowder

Gunstock

Harvest

Hasty Pudding

Head Cheese

Hearth

Hickory

Honey

Hoopskirt

Jackknife

Jig

Johnny Cake

Kerosene

Latch String

Maple

Muskrat

Muzzle

Panther

Pantry

Petticoat

Pig

Ramrod

Rennet

Rifle

Sap

Separater

Sled

Sleigh

Smoke House

Sugar Snow

Sunbonnet

Thimble

Thrashing

Threshing

Trough

Trundle Bed

Venison

Venison

Wagon Box

Washtub

Whetstone

Whey

Wood Box