bagged is a truck with an airbag suspention
there are now 4 generations of dakotas this just denotes the years the bodystyle and interior options were avaliable
tucking is getting the rims to fit within the confines of the wheel well
just gotta point out that most online forums use that^ to list out the different dakota generations, but some sites (like dodgeforum.com) and DaimlerChrylser consider 86-96 as gen I, 97-04 = gen II and 05+ as gen III. can be confusing...