Welcome Sign at Church

I don’t think it’s tacky at all as long as the sign is simple and respectful. Many couples place a small Welcome sign at the church entrance, especially if guests are arriving from different places or aren’t familiar with the location. If you are worried, you could keep the wording very minimal at the church and then move it to the reception later. Ultimately, it’s your wedding, and what matters most is that it feels right to you and fits the tone you want.