I get stuck in the wet grass also. I don't like the stock tires that I have but think that problem is more the fact that I don't have a posi trac rear end in the truck. I didn't realize that at the time of purchase and haven't gone to find out what is involved in changing it. [ is it a replacement or simple upgrade to what i have ?]
note: my last two trucks had bfg at's on them and I liked them. one had posi trac and one didn't. you could get stuck if you parked one tire on a frozen puddle. that was a pain, the posi/limited slip was great.