List out two arrays with all the field data you need for hook_install().

drupal_field_data

include_once DRUPAL_ROOT . '/includes/utility.inc';

$nodetype = '';

$instances = field_info_instances('node', $nodetype);
$fields = array();

foreach ($instances as $instance) {
  unset($instances[$instance['field_name']]['id'], $instances[$instance['field_name']]['field_id']);

  $field_data = field_info_field($instance['field_name']);
  unset($field_data['id']);
  $fields[$instance['field_name']] = $field_data;
}

dpm(drupal_var_export($fields));
dpm(drupal_var_export($instances));