Both csv imports work

src/alpine_bits_python/csv_import.py

@@ -430,8 +430,15 @@ class CSVImporter:
                     stats["existing_customers"] += 1
 
                 # Build reservation data from CSV row
-                num_adults = int(row.get("num_adults", 1) or 1)
-                num_children = int(row.get("num_children", 0) or 0)
+                try:
+                    num_adults = int(row.get("num_adults", 1) or 1)
+                except (ValueError, TypeError):
+                    num_adults = 1
+
+                try:
+                    num_children = int(row.get("num_children", 0) or 0)
+                except (ValueError, TypeError):
+                    num_children = 0
 
                 # Extract children ages from columns (including duplicates)
                 children_ages = []