This is sorta a joke. Spend one month and buy tickets on flights during all types of hours, early morning/late night/redeyes. Spread out the 90 hours of flying over about an eighteen day period.
When on the road remember to only give yourself about a ten or eleven hour period for your "overnights". Remember to pick random places for your overnights. Sure you can throw in a San Fran, Boston and Miami. But also add Detroit(not any of the nice areas), Lubbock and Tulsa.
Yeah no other pilot or FA's. Just pick the random guy next to you and make small talk the whole day. At the end of the month ask yourself if you want to do this every month for about $20k-$25k/year.
This way you can see what its like and its cheaper and less time consuming the becoming a pilot.