We went during what was supposed to be a quiet weekend but it ended up being pretty busy. However, when we got to Soarin first thing in the morning, there was only a 5 minute wait. We went ahead and grabbed fastpasses anyway. My dh took my girls on and got a babyswap for me. When they came off, the line was still only 5 minutes so we didn't need the babyswap so the girls and I headed back on. Came out, the line was 10 min (this was about 45min after park opening) and the girls were begging to go back on. So he took them back on, using the babyswap pass. When they got off, it was our fastpass time... believe it or not they begged us to go back on so I took them and then dh took them using our fastpasses. So in a matter of about an hour and 20 min, my girls rode Soarin 5 times, lol.
If you go first thing in the morning, those fast passes should be very easy to get and you might even get another ride out of it if it's short and you won't need the fast passes yet.