should I worry about gelling?

So to get more technical, Diesel has paraffin wax in it. The paraffin stays in solution until you get to the cloud point. This is the point where gel starts forming. Some of the paraffin falls out of solution and forms a globule. And just like how snowflakes are formed, more paraffin bonds to the floating chunks of paraffin and this makes your gel globules. This is what plugs your filter when your fuel "gels". Typically in colder states (I would think Maryland is one of them), they treat the fuel so that it can withstand colder temps, keeping the paraffin in solution. In extreme cases, they start to blend Kerosene to help keep the paraffin in solution. Think about cooking lard. It's a liquid on the hot pan, but put it in a jar and after a while it turns solid, until you heat it again. Pretty much the same thing.