Dual axle query

A dual axle caravan usually has the maximum weight of van divided by 4, and that weight has to be less then the tyre load rating to be legal. Most tyres used are NOT double or more in their load rating than the 1/4 caravan weight normally applied to each wheel/tyre.
Removing the wheels from one axle means you have, at least, immediately doubled the load on the remaining tyres, so unless the load rating has the capacity to handle that double the normal load rating. No you can't.

Removing the wheels from one axle would impose a disproportionate loading onto the remaining tyres and axles and even if the tyres could handle the load the axle rating and bearings capacity is almost sure to be exceeded too.

Depending on which set of wheels were removed, ie, the front ones, much more additional load will be on the coupling and rear of the vehicle.
If rear tyres of van were removed, the overhang weight would more than double the tyre requirements because of the weight leverage factor.

Probably you couldn't control the caravan anyway, as it would be so unstable with uncontrolled weight taking over.

Drive really slow with the HAZARDS on if you do!

As stated by RMB usually the reason a dual axle set up is installed is that is is required to carry the GTM i.e.Gross Trailer Mass. Yes in a dire emergency you can do whatever you have to do to get out of trouble but technically it would meet your requirement as regards 'safety'. Another factor to consider is the type of suspension fitted. If it is the load sharing 'rocker' type suspension with the wheels removed from on axle, the suspension will be at its limit of travel and the remaining tyres may contact the body of the caravan. At the very least the loaded axle will be sitting on the bump stops.
Why not just carry two spares? That way you have to get 3 punctures to be immobilised. Also a tubeless temporary repair plug kit. If you plan on getting lots of punctures, fit split rims, 10 or 12 ply LT tyres, carry spare tubes, vulcanising or cold patches, a compressor, tyre levers and a rubber mallet. That way you can fix your own punctures as they occur.

Thank you. Both of your replies have clarified the situation for me.

Cheers,

Thommo

hi
If u have 1 puncture in a dual axle tie the axle at that end up with chain or strap .
Otherwise most times the brake/hub will drag on the ground .

There was a dual axle van with simplicity suspension coming back on the Kalumburu road May this year tried it. It had broken a stub axle so they chained the trailing arm thinking that would be ok to get back to Kununurra for help. The van only got about 1km when that single wheel failed, not the stub axle.