Your single affadavit (sp?) is only valid for 3 months from the time you sign it, so there is no point in starting the process any earlier than 3 months. We didn't go through WEDO, but 3 months is plenty of time.
Since you live in TO, it's probably worth your while just to go directly to the Dominican Consulate to get it done. That's what we did. We just went to the consulate office with our birth certificates, unsigned single affadavits (you have to sign it in front of them if I remember correctly), passports & copies of our witness's passports. For the affadavit, I've attached the word document here - just fill in your information. The Dominican consulate will then mail you your translated documents. If you have any other questions about it, just let me know. I'll see what I can remember!!
Oh...and I found the website for fees. It's $360 US...but I think some resorts require legalized documents which I think we paid an extra $200. We heard that our resort didn't require legalized docs, but we didn't want to chance it. We paid the $200 just in case!
Here's the addy...
Dominican Republic General Consulate - Toronto
347 Bay St. Suite 904
Toronto, Ontario M5H 2R7
Phone: (416) 369 - 0403/1602 Fax: (416) 369 - 1685
Oh...and I didn't register my marriage here in Ontario. I've asked around & it seems like you don't have to. And I went to a translator at a multicultural center to get my marriage certificate translated & didn't have any problems changing my name over. And I only paid the translator $35 - not the ridiculous $100+ that some online translators will charge!!
Statutory Declaration of Single Status.doc