Charging for extras often leaves guys feeling cheated, an out-call price should really cover a certain area as inclusive.
i have always set a price and I only cover a certain area which is included in the cost. I charge an extra ?30 for out calls than i do for in-calls and only offer an hour, this is shown on my profile. The extra cost reflects my travelling time and petrol costs. I do not travel further than I am happy too and will not do so even if they offer me extra money for my travel time / costs.
Should you be happy to travel further then it is worth mentioning on your profile that you only cover a certain area or that over so many miles you will charge more.
As you rightly say, guys hardly ever read tabs, so it is best to highlight in bold & colour the word Out-calls followed by your "rules", on your main profile page.
Sarah x x x