Yes, both food and drinks will be provided at the reception.

Yes, the ceremony will be outside and the reception will be inside. Late May in Oklahoma can be pretty hot so be prepared to sit outside for the ceremony.

Spring cocktail means you do not have to wear any sort of black tie attire but more so think sun dresses and light dress clothes. It will be hot so take that into account. Think fun spring colors and floral prints. I have included some inspiration pictures in this section for examples of what to wear.