Remember who gandalf is. He is an Istari who, long since his entry to ME, has had an affinity to Hobbits, studying their culture, familial lines, and individual Hobbits. gandalf in his wisdom and insight knew that frodo had some Took hidden in him that would prove valuable to the Dwarves. And yes, the dwarves sought Gandalf's help. Gandalf doesn't just decide to have an adventure and then round up some dwarves.
Frodo had the same virtues as Bilbo, being of the same line, but the ring chose him more than he chose the ring.
|