I agree with the above, if you put your barn away from the access you will then need (I'm guessing) to install a track to get to it with vehicles in the winter. A length of cable will be cheaper than a length of hardcore track.
As above, build a small meter cabinet just where the supply enters your field...then run a cable to your barn which is yours and private...so just the cost of the cable and connections at each end. Ideally armoured cable buried in a trench....but depending how far it is you could even run off an extension lead over land..depending how far it is and what you want to power and security issues.
I don't think you need a specialist contractor to bury your own cable, but I'm sure someone will soon advice if I'm wrong, however there are recognised standards , and you only do it once...so do it right, to the correct depth and with marker tape.