Why did Ya'akov call Rachel before Le'ah (despite the fact that he married Le'ah first and she bore him the most sons)?
Rashi: Ya'akov's attachment to Lavan began with Rachel, and so, from the word go, he considered her his main wife. 1
Why did Ya'akov leave without informing Lavan?
Seforno: Because, when he saw how Lavan had accepted the Lashon ha'Ra of his sons, he was afraid that Lavan would steal from him. 1
He later says so explicitly to him (See Bereishis 31:31).
Why did Yakov call his wives to come "to the field, to the flock"?
Tosfos ha'Shalem (1): He called them to the field, lest others hear. 1 He called them to the flock, lest he abandon his work. 2
Tosfos ha'Shalem (2): "Melech l'Sadeh Ne'evad" (Koheles 5:8) - counsel is taken in the field.
Even though Lavan has been deceitful for 20 years, and Yakov must flee, he works faithfully as long as he is there! (PF)