I would direct you to
Dimitrov's K-mount Page. He has descriptions of all Pentax K-mount bodies. The A3000 will support your DA lenses in Program mode only. Be prepared too for significant vignette and fall-off of optical performance at the margins of the frame. Most of the DA lenses have an image circle that is inadequate for the larger frame size of 35mm film.
As noted, your best bet for cross-compatibility between your digital and film is with A-series or newer bodies that support program and/or shutter-priority exposure automation. This is particularly true if you buy lenses that were originally made for film or are compatible with the 35mm format (Pentax D-FA, for example).
That being said, if you are primarily interested in the "film experience", your best bets may be with K-mount cameras from the mid-1970s into the mid-1980s. That is considered to be the golden age of SLR cameras.
Steve