no, not at all these ones are just fine... well i'll just say they were brand new in august, with a tread depth of 0.50", and as of last week i'm measuring a tread depth of 0.17". i'm really freaking impressed and just loving these coopers with their great traction and long life - they've been on the truck a whole 7 months, including one month of sitting while i rebuilt the engine. and they have about 2 months left before they reach their legal wear limit of 0.10".
i will admit they're a highway tread, which doesn't help me off-road. but i expect more than 8 months of service out of a tire before its gone!!!
i'm thinking i'll take a lesson from the heavier truckers and get an aggressive tread on the drive axle and a highway tread on the front end. i also plan to tell the tire shop i want the most durable freaking tire they can order, with a good mileage warranty that means something.

 

That sounds like a good plan. The heavier duty rear tires would probably keep you out of trouble from getting stuck. Especially with all that weight in the van.

 

I like using those really deep usually chrome lug nuts. I grab an old one that already has had or I knock out the chrome end cap(the part that closes the end is just a pressed in cap). With the cap out the outside end of the nut is square and has a recess so it will press right against the flange and go over the shoulder should it come out of the flange a bit. Most important though the length generally 2 1/2-3" gets you full engagement of the threads.

 

The studs are already in and the axle is in the rear end now. The brakes are all put together. I just have to bleed them and it will be ready to roll.