Yes. I presume it's one that fits over your towball, so just allow the caravan to rest completely on it as if towing, with the caravan and car on level ground.
Adjustment is just a matter of moving any heavy stuff from directly over your axle(s) very slightly backwards if noseweight is too heavy. You really can't have noseweight TOO light, but anything of weight should be neither too close to the front or back of your van. Though I always find two full gas bottles in the locker a problem. If you have a twin axle like us, you WILL find adjusting more difficult, despite what others may claim. It'll just take more time.
Our gauge is old and not so accurate. Many others have recommended using bathroom scales under a stick of appropriate length. Think we'll try this ourselves.
Bon chance on your hols, or as the French say "Merde pour..." though to be polite you don't actually say the M word, just nod.
We're off on the 23rd for 4 weeks. Can't wait. Hopefully we'll find somewhere to live and just come back to pack.
Tim.