Post wedding reception?

We’re really struggling here! We want to be sure our friends and family get to celebrate with us, but we decided on a destination wedding as I’m from Michigan and my fiancé is from Illinois! We decided to have a small ceremony/reception for family and closest friends in Tennessee. We have some family members (and us to an extent) that feel we need a reception for those family members that we didn’t go far enough inviting to TN with us for travel reasons. But that puts us throwing 3 “receptions” and that’s just a heck of a lot! So as a bride to be, I’m struggling as to how to handle this? Do we make it casual? Have a cake? Do I wear my dress in 3 states? We already don’t have a registry but some small things, so gifts are certainly not something we’re expecting. But just celebrating with all. Thoughts!!?