Family Vacation & Need Help

Hi everyone I need some advice. We have a family vacation planned and I do not want to use cash for everything. I recently went through a ch.7 bankruptcy (covid hit us and we could not recover) I am sitting at about 712 credit score all around for the 3 CB’s. The biggest credit line I have gotten is $700 in a pre-approval. I would like at least 15-20k, does anyone know where I can apply or even get a trade line for purchase to assist with higher credit rating and approvals?