With an IWB holster you can conceal a 4" gun as easily as a 3".

I carry a 4" 44 Mag concealed quite a bit, but you may find that a steel N frame gets heavy at the end of the day. A GOOD leather belt will help a lot toward comfortable carry. I use a Milt Sparks Summer Special, or a close to the body custom pancake style holster.

If so, then a 45ACP Night Guard is worth a look as they are a lot lighter.

I do not think its recoil is bad, even with the small wood grips I use, but also I shoot a lot of 44 Mag in my Mountain Gun.