At Westjet, we are using No Alternate all the time with no real increase in risk. Our company SOP's dictate that our minimum fuel is 5000 lbs at destination. 3200 lbs for the legal requirement then the remaining 1800lbs is for unforseen circumstances in a No Alt environment. I have seen IFR alternate fuels that calculate less than 5000lbs. However, we always carry the min of 5000. When I accept a No Alternate plan, I usually check the airports nearby that I know I can get to if required. No Alternate is not a problem.