Watch your foot width, too. One of the negative side effects of working power variations heavy without working the full versions is that you start jumping your feet too far out.
If your gym is OK with it [that's the BIG 'if'], you can get comfortable with dropping weights even if there isn't a platform or bumper plates. I missed 170 once yesterday before I snatched it, and missed 175 three times, losing it out front twice and taking it on the back of the head once. No problem. Yes, oly gyms are better; I'm switching to a real oly gym next month. But if Tommy Kono, Paul Anderson, and John Davis could snatch and c+j whatever ungodly amounts of weight they did without plates, so can we.