Herbert Jenkins, 1959, illus Peter Biegel
Rachel decides that it is time she and her brother Louis, who have always been used to the best of everything, learned to rough it. With their friends Martin and Frances, they make a camping tour of the local gymkhanas. However, matters get complicated when some men are determined to steal their cart. They cannot understand why, but nothing seems to put the men off.
Many thanks to Susan Bourgeau for the picture.