NIMBUS
I want to point out just one or two problems with operating IMC in uncontrolled airspace in FAA jurisdiction. First, you may well be able to get up there but how do you get down? Unless you fly out of it at a level altitude you have to descend or climb. More often than not a climb will put you in controlled airspace for which you need a clearance and, in order to descend to a civil airdrome you must use an approach contained issued under Part 97, which puts you back in controlled airspace. The other option, descending without an approach procedure to a field somewhere brings me to number two. When the FAA hears of this brail approach method they would likely drop their "careless and reckless endangerment" trump card on your certificate. A bad thing. The above does not apply to military unless they want, so are not considerd here. Under very predictable and controlled conditions you would be in no more danger than with an IFR flight plan in controlled airspace but, do you have that control and predictiblity? not for my money.