Eh, it's an unfortunate and awkward step you can't really avoid, but as long as he is properly informed about your fam, it should go okay. Nothing much you can do about getting a constant earful from your mom though.
So my parents, super conservative background, came from legalistic churches, etc. We were always the rebels in the groups luckily, but there's still a lot of... Let's say.... "Old Opinions".... They run strong in my fam...
The last girl I brought home to meet the fam- she asked if she should take out her nose piercing, and cover her tattoos to meet my fam. I told her no, to be her and do what made her comfortable, and if my fam had an issue, then it's their issue, not hers.
And it was fine, no big deal. I cooked dinner, she chatted with my fam and flirted with me, we ate, then we played Minecraft in my room while my four nephews were just amazed that I knew a girl who could play Minecraft, and they told her every little detail of Minecraft info they had in their brains. XD
It was after she left that the drama started, and people started making their backhand comments, etc.