Sorry I could not find a specific pattern for a baby camel pull toy. (There could be one somewhere!!)
However there is a freebie pattern for a needlework one (after you become a member of the site) and you could work out putting the wheels and/or platform on the base of the camel to make it a "pull along" toy.
The camel pattern is needlework, but you can work it as a cross stitch pattern.
I'll also put a drawing of an elephant pull-along toy as you could possibly use this diagram to help work out the base for the camel?
There is a duckie pattern too:
Scroll Down to Animal Magnestism #42: Camellia Camel:
Elephant pull-along toy: