Dinosaurs come in two varieties:
Large; Snarling, Growling, Large
and Small; Curious, Skinny, Small
Small dinos are pretty easy, and can be killed by anyone with enough weapon and dodge skill to evade their attacks.
Large dinos will tear you apart unless you have huge protection (40 slash/stab/whatever) and can kill them quickly.
There are dino contracts sometimes available at Davy Jones's Footlocker for $4500, and dinos will get you $3000 each with a max payout of $75000.
The Temple Edit
To vampires looking for a place to hide out after killing dinos all night, don't go there. It doesn't have a roof.
I had to learn that the hard way.