I train squats and Dl work almost always by myself , but I drive to an hour and 10 minutes to Nazareth Barbell twice a week to bench. ( My bench went up 75+ pounds since jan.) I can't imagine doing shirt work without a couple(3) spotters, it really helps keep the weight off your face.
Btw: training at a place like Naz with Mike Miller, Bill Crawford, Bobby Fields, and the newest member of the 700 club Stan"Ox" Martin (and a host of others strong SOBs ) really keeps a fire under you ass and a good "nothing is impossible" vibe.
Find a powerlifting gym or a couple other guys in your area and get some help. Elite Fitness Systems in the past has posted guys addys who are looking for partners, give it a whirl.