Is it okay to have burgers?
My fiance and I are getting married in late summer at a farm in the mountains. We want the feel to be fairly casual (groom and groomsmen in khakis, bridesmaids in knee length dresses with flats/wedges, lawn games during cocktail hour). We want to use our favorite grass-fed burger place for catering because we know them and love their food. We also ate there a lot when we were dating, so it's a bit sentimental for us.
They offered to bring their grills and make sliders to order. They will have beef, chicken, and vegan burgers, as well as gluten free buns for those who need them. Guests will be able to order either his or hers signature sliders (his: bbq sauce, onions and bacon, hers: goat cheese, peach chutney, and arugala) or plain sliders. There will also be a toppings bar. In addition, we will be offering a buffet of sides and salads (2 salads, cheddar and gouda mac and cheese, sweet potato hash with bacon, and roasted veggies).
We both think this sounds delicious and it is SO us, but my mother is concerned that guests will be offended that they are "only" getting burgers because many of them are coming from out of town. Is this true? Should we ditch this idea and find a more conventional caterer?