Just a follow-up to my original post. I decided to call Drive Clean for clarification. They told me that their "procedure" has changed, and the emissions testing facility has to look at the door plate information for the GVWR. Unfortunately, on our Roadtrek, this information is blank, which means that the weight becomes a 'default' value of 5000 kg. The Drive Clean customer service agent told me that going forward, I need to get a letter from Roadtrek stating the true weight of the vehicle which in past years was listed as 3981 kg. I was told that there's nothing I can do about the $88.00 fee this year, but in future years I'm hopeful that this letter from Roadtrek will return the vehicle to its previous light-vehicle status. This is good, because the emissions test will be 'free' in the future. (Other taxes will undoubtedly go up to pay for this freebie.)
Oh,the joys of living in Ontario!
