Essential to be under on all your legal limits. So while we had weights checked soon after taking delivery of the van it didn’t take into consideration the changes or additions subsequently made to the van. Hence the preference to have the car and van professionally weighed again. We were fully loaded for a typical summer adventure… all water tanks full plus an additional 20L water container, full fuel tank, etc. All legal requirements were under (car and caravan) except for the car’s rear axle. Fortunately the rear axle was exceeded by a small amount so by repositioning some items in the caravan and disposing of some of the water in the 20L container we were able to be “legal” on all specs.