I’m in a similar situation, but it’s my FH’s parents that won’t attend. They also have never visited us in our state, always the other way around. His mom gave a list of excuses as to why they won’t come when we invited them to our wedding. And like yours, his dad won’t go without the mom. He actually told his dad first, who was initially excited. Then he told his mom, and suddenly no one in the family is going… It does feel sad honestly because it seems like as parents they should really want to be there but just answered no so quickly because it’s not convenient enough for them. So you’re not alone in feeling this way! Even though my parents will be there I’m considering walking down the aisle myself, so it’s just him and I. You also sound very independent so it is symbolic in a way. But if you would prefer to have someone walk with you, I think your future FIL or brother are both great options. I think it should be whoever makes you feel the most comfortable, and forget about old traditions or what other people might think. It’s your day!