A WDH hitch sticks way out beyond the receiver. Here are some pictures of my setup: Forest River Forums - mtnguy's Album: Reese Hitches - Picture
My receiver has 2 holes, and my hitch shank has 2 holes. I currently use the most forward holes on each. I could probably shorten the distance by just by using the receiver front hole and the back hole on the shank, but my current setup allows me to open the tailgate without hitting the tongue jack unless I am at a sharp angle.
Once you get the WDH setup properly, I don't think the distance should make a difference.
But, noticing that it was posted that the hitch was rated for 1200/12000 lbs., that might be close to the limit of a 33' trailer. For hitch shanks that have 2 holes, the back hole must be used for the maximum rating....using the front hole will sometimes reduce the rating by a couple of hundred pounds. Do you know the tongue weight ?? And what is the spring bar rating ??
Chap , DW Joy, and Fur Baby Sango
2006 Ford F150 Super Cab 4x4
2008 Surveyor 263