You need valid TRV, valid WP and the letter from your employer. With these at hand you should not have problems during your re-entry.
Hi There
I'm have a same situation with zeal1043 Now I'm going to renew TRV for go back home April 2012. I've been working with the same employer for 2 years and 7 months, my work permit valid untill March 2013 while I waiting for my OWP Can I go home? Is it safe ? My employer will write the cover letter for me that show she allow me to go home and write departure and return date. Is that help enough for re entry to Canada?