Adrian
Without knowing exactly which 10" dob you have, as a rule they are fairly robust. My 12" went on trips a lot with no issues, of course rarely off road.
The worst that could happen is the primary coming loose, but the cells usually hold these quite well, I have never heard of one coming loose.
Other issue might be dust, but covering up the tube say with a sleeping back will stop that and cushion it a bit.
Malcolm
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