A 3' 629 can be carried concealed IWB or OWB or in a shoulder holster, but a 4" is more comfortable OWB. My IWB is a Sparks VM2, and OWB an Alessi CQB.
The recoil is stiff, but you get used to it. After 10 rounds or so, you hand loses most of its feeling. .44 Special is roughly equivalent to .45 Colt or ACP, and is relatively mild in this revolver.
I fit the 3" with Ahrends Boot Grips, and the 4" with full-length Ahrends RB grips. there's only 2 oz difference in weight, but the the 4" is more barrel-heavy, which handles better with longer grips.