PA is my state of legal residence and inspections were one the biggest things I hated about living there, aside from not being able to buy beer at 7-11. Anyway, some more metropolitan areas test for emissions and this is where the expense will be if you fail. If you don't live in one of those areas, then good you'll be fine. What they do is take off the wheels and check your brakes, they will check tire tread for wear, body for excessive rust (has to be rusted through pretty big area). And lastly they will check lights and turn signals. Nothing to get worked up over if you keep up on your routine maintenance items. Most places don't take the time to be very thorough anyway because it's easy money for them and they have bigger and better jobs to work on. Just make sure your emissions are ok if applicable.
93 4.0L YJ. 4" Skyjacker, 2" body lift, Warrior HD shackles, Energy bushings. BFG 35" AT's...Blah, blah, blah...
94 Full Size Chevy Blazer
00 H-D Road King Classic
98 H-D Fatboy