STUDENT PLT ON SOLO XCOUNTRY INADVERTENTLY ENTERED A RESTRICTED AREA WHILE PRACTICING NAV BY PILOTAGE.

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THE PROBLEM AROSE BY NOT HAVING ENOUGH TIME TO COMPLETE MY FLT TO BE BACK AT MY HOME BASE FOR THE NEXT TRAINEE SCHEDULED TO RENT THE ACFT I HAD. CONTRIBUTING FACTORS WERE INSUFFICIENT TIME FOR COMPLETION OF ENTIRE 'LONG' XCOUNTRY TRAINING FLT; LACK OF TELEPHONE CALL TO FBO TO INFORM THEM OF MY ETA. INCURSION INTO RESTR AREA 6602 IS CONSIDERED SINCE; AFTER DEPARTING MECKLENBURG/BRUNSWICK ARPT (5W2) I HAD INTENDED TO FOLLOW INTERSTATE RTE 85 BY PILOTAGE UNTIL I COULD PICK UP THE 181 DEG RADIAL FROM FLATROCK VORTAC AND TURN N. I BELIEVE I MAY HAVE MISTAKEN INTERSTATE RTE 58 WHICH DISORIENTED ME AS TO MY EXACT LOCATION. I WAS FLYING E; WHICH WAS THE DIRECTION I WANTED BUT THE WIND THAT DAY WAS 350/16 KTS AND IT WAS BLOWING ME OFF COURSE TO THE SE. I WAS ABLE TO TUNE IN THE FLATROCK VORTAC; IDENTING IT; AND FLY TOWARDS THE STATION WITH THE OBS SET AT 001 DEGS WITH A 'TO' INDICATION. THE NEEDLE KEPT INDICATING THAT THE RADIAL WAS TO MY R ABOUT 4 DEGS SO I CONTINUED TO ADD MORE WIND CORRECTION INTO MY HDG. WHEN I GOT CLOSE TO WHAT I BELIEVE WAS THE TWR LOCATED AT 37 DEGS; 3 MINS N; 77 DEGS; 49 MINS W; I FLEW APPROX 1/2 MI TO THE L OF THE TWR. I WAS NOT EXACTLY SURE OF MY LOCATION SINCE MY ORIGINAL DESIRE TO FOLLOW INTERSTATE RTE 85 WAS NOT TAKEN WHEN I TURNED E AFTER TKOF FROM MECKINGBURG AND FOLLOWED INTERSTATE 58 INSTEAD. AFTER PASSING THE TWR I CONTINUED N WITH MY INCREASED WIND CORRECTION ANGLE ALREADY ESTABLISHED UNTIL THE NAV NEEDLE WAS CTRED. I SHOULD HAVE ALLOWED MORE TIME FOR THIS ENTIRE FLT GIVEN THE FACT THAT I AM A STUDENT PLT. I WILL DOUBLE MY ANTICIPATED TIME REQUIRED FOR PLANNING PURPOSES FOR FUTURE FLTS.