Wedding or no wedding

We've been together for 6 years. Our son will be 5 next week. We've been living together for 2 years in December. Engaged for 3 years September 1st. The reactions that I'm getting from my side of the family is making me rethink everything. We're putting a down payment down this weekend for a venue. Is it really that stupid to plan a wedding?? The reactions I'm getting from my family is making me rethink everything and lean more towards a courthouse wedding.