In terms of performance, a few examples taken straight from the tables in the AOM to give ball park figures of what you can expect.
Sea level, TODA 1000m, 25 degrees C, flap 15 gives a restricted take off mass of 24686kg.
The same conditions but with 1500m TODA gives unrestricted TOM 29500kg.
Look @ 3000 feet elevation, 1000m TODA 25 deg. C, flap 15 give an RTOM of 23000kg.
Same again 1500m TODA gives an RTOM 27800kg.
Bear in mind the basic empty mass is around 17300kg and you can take upto 5200kg of fuel. It's a good aircraft, very economical and a good performer especially in cooler climates. I don't know how long the gravel strips would be or the elevation but the loads certainly could get extremely restrictive for passenger ops.
Hope this is of some use, but as mentioned by previous posters Bombardier will be able to give you more detailed info tailored to your requirements.
Rgds.