been there. done that.
2X4? keep a come-a-long and length of chain or heavy rope in the bed box or behind the seat under the "road soda's". I have had a few 2X4's and liked them but I got into trouble alot. I did alot of trail rideing and mudding with my 4X4 buddies. They pulled me out alot. But I learned with time and a lot of come-a-long cranking.