As you're probably aware, you don't want to push the envelope while on 1st year probation. BUT, with that said, we have a commuter policy that is pretty solid. You have to have a minimum of 2 flights that get you to your base at least 30 min. prior to your show time. The flights have to have seats (including JS) available 24 hrs prior. If for some reason (i.e. MX or WX) you don't get there you are covered. Now if you fall back on the policy a bunch of times, you may have some 'splainin' to do.
Don't let commuting get to you - it make your life miserable. I've done for 7 years and I wouldn't change a thing - albeit, it's a short commute with high frequency.