To worm or not to worm when moving to a new grazing??

I have only recently found out that we are moving house and so my horse is moving to a new grazing this weekend... and I am still undecided on whether I should deworm him 48hours before arriving on the new grazing.. BUT, the thing is... I dewormed him only 4 weeks ago (He is on a 3 monthly deworming schedule).

Should I still deworm him to ensure that he will not bring any over to the new grazing? (On the new grazing he will be grazing by himself in large paddocks with only a neighbors horse over the fence in one paddock)
I have only had him since Nov 2010 and the entire time he has been grazing solo in large paddocks (roughly 5 acres in one particular paddock) he's only ever grazed with my neighbors horse for 3 days in the time that I have owned him and since been dewormed.

I have mixed thoughts on the situation, I've been told to do a FEWC but then I have also had a vet say they are not very accurate and that you could have a negative sample and yet still have worms. Then people saying I should deworm him prior to really give the worms the boot but then others saying you'll be building up a resistance to the dewormer drug!!

HELP!

I think I would be more inclined to worm after I move, as you don't know what's in the new pasture. Unless you have reason to think worms are an issue at your current place.

Hmm I never thought of it like that! Good point. Its been grazed by cattle for the last couple of months so I don't think there would be much. I don't think my current place would have high amounts because he has so much land to graze on and he is the only horse grazing it?

I just moved one my horse about 2 weeks ago. I always worm after a move, no matter when I wormed last. Your horse wont be harmed by worming him again, if that is what you are thinking. There are plenty of barns that worm horses on the 1st of every month with no harm done (except for building resistance), but one time wont do that with your horse. If you really want to know his worm count, pull a fecal and send it to your vet. That's what I do with my guys every 3 months and if the count is high enough, I worm them.