If you get a good luthier to fix the crack using Titebond (basically PVA glue on Steroids - standard PVA is prone to "creep" (ie: it never actually sets rock hard) and is not totally moisture proof), you really shouldn't need dowelling, as explained to me the maximum surface area for glue to act on is what is important, and your neck has long, non-splintery cracks, rather than a sharp break - that should make the repair relatively easy.
No epoxies, no araldites, no superglue!!! If you want to have a go yourself, Stewart McDonald luthier's supplies sell titebond. If you have the slightest doubt about your abilities, find a good luthier!
Oh, yeah, one other thing - detune / remove the strings and leave it that way until the repair is done!