PVT PLT OF A C172 BECAME LOST AND INADVERTENTLY ENTERED RESTR AIRSPACE.

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I WAS ON A VFR PLEASURE FLT FROM PUW TO BFI. CONDITIONS WERE VFR; BUT HAZY. THE VOR WAS OTS IN PULLMAN UNTIL AUG/XA/00. BECAUSE OF THIS; I PLANNED TO USE PILOTAGE (FOLLOWING ROADS) AND CHART NAV TO RETURN TO BFI VIA ELLENSBURG. WE HAD FLOWN TO PUW USING THE SAME METHODS A FEW HRS EARLIER; I WAS FAMILIAR WITH THE RTE HAVING LIVED IN THE REGION FROM 1984 TO 1988; AND SOLID VFR CONDITIONS WERE FORECAST THROUGHOUT THE REGION; SO I FELT VERY COMFORTABLE MAKING THE FLT. MY PLAN WAS TO INTERCEPT HWY 26 OUTSIDE OF COLFAX; AND FOLLOW IT W TO OTHELLO; THEN TO VANTAGE; AND THEN FOLLOW I-90 BACK TO THE SEATTLE AREA. THIS IS WHAT WE THOUGHT WE DID; BUT APPARENTLY WE FOLLOWED ANOTHER HWY. APPROX 40 MINS INTO THE FLT; I DETERMINED THAT I WAS LOST WHEN MY KNOWN CHKPOINT WAS NOT THERE. I TRIED FOR ABOUT 15 MINS TO DETERMINE MY POS ON THE CHARTS USING NAVAIDS AND PILOTAGE; BUT I COULD NOT GET A GOOD FIX ON THE VOR THAT I THOUGHT WAS CLOSEST (MOSES LAKE). AT THIS POINT I CONTACTED SEATTLE FSS ON 122.0 AND ADVISED THEM THAT I WAS DISORIENTED (I SHOULD HAVE SAID LOST). I WAS IN THE PROCESS OF CLBING TO 10500 FT MSL WHEN HE PUT ME IN CONTACT WITH SOMEONE WHO ASKED MY HDG; ATTITUDE; FUEL AND SOULS ON BOARD. HE THEN HAD ME SQUAWK 7700 AND IDENT; THEN HAD ME MAINTAIN MY DIRECTIONAL HDG; AND MAINTAIN STRAIGHT AND LEVEL (I WAS AT 10100 FT MSL); AND VFR. HE THEN ADVISED ME THAT I WAS IN A RESTR AREA. I DETERMINED AFTER THE FLT THAT IT WAS R-6714 (YAKIMA). I AM NOT SURE WHICH AGENCY I WAS TALKING TO AT THIS POINT (SOUNDED MIL). I WAS THEN PUT IN TOUCH WITH CHINOOK APCH FOR FLT FOLLOWING TO ELLENSBURG. AT ONE POINT; 1 OF THESE 2 AGENCIES HAD ME DO A DIRECTIONAL STEER; BUT I AM NOT SURE WHICH ONE. AT ELLENSBURG; I CANCELED FLT FOLLOWING AND PROCEEDED BACK TO BOEING FIELD VFR WITHOUT FURTHER INCIDENT. TO PREVENT THIS IN THE FUTURE; I WOULD ASK FOR FLT FOLLOWING FOR THE ENTIRE RTE. ALSO; I WILL USE MORE DILIGENCE AND MAINTAIN BETTER SITUATIONAL AWARENESS WITH RESPECT TO MY POS ON THE CHART. ALSO; I PLAN ON PURCHASING A GPS AS A BACKUP NAV TOOL. HAD I DONE ANY OF THOSE THINGS; MY GETTING LOST AND PENETRATING RESTR AIRSPACE COULD HAVE BEEN PREVENTED.