Understand that the stability system, traction control and ABS will default to OFF when they determine a fault.
So, you would be driving a vehicle with no stability system working, no traction control working and no ABS.
These vehicles really need the stability control and traction control. When these systems turn off, their driving characteristics change drastically.
I would strongly recommend having it checked out before your trip.
It could be something simple or not.
Personally, if my vehicle's stability control wasn't working properly, I wouldn't drive it on a long trip. But that's only my opinion.