Thanks for pointing this out Ted ... agree 100%. Not carrying a tube IS something that will STOP YOUR RIDE ... right now. I've seen many tubes ruined from just one puncture or a pinch ...both street and dirt. Maria, you've been very lucky in the past. If you go with no spare tubes ... you may just be "pushing your luck"!

Sometimes a tube splits for no obvious reason, sometimes a nail (or whatever) is stuck in there and tears up the tube ... not repairable. Sometimes, like in my pic below, bloody valve stem pulled right OUT!

Try fixing that one! (the green stuff is SLIME)

As Ted says ... at least one 21" tube. (YES .. it will work in the rear) Use front fender pack for your tube. But if me, on a Mongolia ride? I'd take at least 2 tubes, maybe 3. They won't be for sale at every other Yert.

Note 21" tube mounted to front fender. Has never come off ... keep it tight.

In years of off road riding, lots of Baja riding I've seen many problems regarding tubes. Having a tube mailed in would take probably two weeks.

If cables are closely checked pre-trip ... I would opt for no spare cables.
i've not broken cable in 30 years ... since the "bad old days". No spares needed if cable routing is correct and no stress points exist and no wear shown upon inspection. If any doubt, replace with BRAND NEW cable PRE TRIP.

Packing camping gear is a challenge. Any way to leave it behind?