Trek make a bike purpose-built for strapping on camping gear and hitting unsurfaced roads. Its a touring bikes, the Trek 520.
The standard tyres can be replaced with 28mm ones for faster riding on roads.
How tall are you, the 520 is not so good in its smaller sizes ( a bit too long) and other makes may be better.
Touring bikes are not a theivable as other styles, but they ride better than hybrids and carry more than standard road bikes.
I have 2, a nice one for play and a nice one that looks bad for work.