I have been under the assumption that you cannot enter I F R conditions with out a clearance to do so
There you would be wrong. You have to have a clearance to be in conditions less than VFR
within controlled airspace. In uncontrolled airspace a clearance is not only not necessary, it's unavailable.
If you read through this thread (see my earlier post). It is quite legal to depart in instrument conditions in to uncontrolled airspace. A clearance is not required nor does the airport need an approach. It is on you to verify you have terrain clearance.
Of course, there's precious little uncontrolled airspace out there, and practically none is available for en route use. So you'd best have a plan for what you intend to do. If it's not VMC where you could pick up a clearance in the air, you'd best have an IFR clearance for the overhanging controlled airspace before you depart. The FAA has strung up at least one pilot for trying to scud run out of a field in uncontrolled airspace without a clearance and called it reckless.
I would call ZTL on the ground and get a clearance of CLEARED DIRECT CJR UPON ENTERING CONTROLLED AIRSPACE FLY HEADING 230 THEN AS FILED...
I have no approach into my grass strip but I don't need no stinking departure procedure. I'll not hit anything on a straight out departure.
Coming in, if I can't get down from the MVA in visual conditions, then I'll fly the approach into one of the adjacent airports. For my own planning purposes, I compute TWO alternates. If I was going into let's say SVH or 14A, I'd have to pick a pretty far away alternate (HKY or RUQ). While I probably could legally file SVH or 14A as my legal alternate into NC26, I'd still like the option of getting to HKY, RUQ, or CLT with the fuel on board.