For what its worth, I reckon you should try the arrangement of your choice using a long fire then, after that, when you've got your confidence up, what about trying another night by building a debris shelter, really stuffing it with leaves, then taking your blankets in too? There will be no need for a fire so long as the shelter is top notch. I can't recall if your site has a lot of deciduous trees(?). BTW if you want a referee or safety marshall or something, I have spent at least one night out every month this year except July (yes, including when the snow was on the ground) so would be happy to help if its a week night you choose. All the best in your search for enlightenment!