A group of women will roll in to Delaware County Friday, towing nostalgic trailers filled with the adventurous spirits of a coveted “sisterhood.

About 35 members of Sisters on the Fly will caravan into Cedar Oaks RV Resort where they have planned to have a “knee-slapping good time.

Who are they?

They are among a group of 751 adventurous women who share three common hobbies - fly fishing, horseback riding and, most importantly, collecting and refurbishing vintage recreational vehicles.

The organization was founded by sisters Maurrie Sussmen and Becky Clarke. They dreamed up the idea nine years ago, while fly-fishing on a river in Montana, according to Sussmen.

“We were happily drinking a glass of wine in celebration of catching an 8-pound Brown trout, Sussmen said. “We thought it would be fun to share this with friends.

These creative vagabonds, ranging in age from 21 to 87, load up their refurbished trailers and head off on camping trips around the U.S.

A fleet of vintage trailers - from the 1950s and beyond - have been rescued by the sisters who have given them new life with spiffy new interiors and elaborate western or cowgirl motifs.

The members name each trailer according to its theme and character.

“There is no good one, just great ones, Sussmen said. “Each trailer has its own name and number. It is decorated inside and out in a western kitschy theme, Sussmen said.

What do they stand for?

These women claim to have found a way to offer empowerment and sisterhood through exceptional outdoor adventures. They even have a Cowgirl College, where the members have fun while learning how to ride horses, ride trails, work cattle and rope steers.

“There is a little cowgirl in everyone. Sussmen said. “These cowgirls are living up to the spirit of the women of the Old West.

While here, the women plan to visit Har-ber Village, take a cruise on the Cherokee Queen, go on a guided fishing trip, do a little sight-seeing and a whole lot of laughing.

Local members, Joyce Nelson, sister No. 390, and Karla Jones, sister No. 303, will be hosting the group of visiting sisters from Texas, Arkansas, Missouri and Kansas.

To find out more about how to hook up with Sisters on the Fly, visit their Web site at www.sistersonthefly.com.