I went back after 'only' 15 years out. Amazed myself by making much better grades than the first go round. Did have to drop my 8 o'clock class though as getting hubby to work, 3 boys to the elementary school, the other 2 to the base preschool and then drive all the way across town and try to find a last minute parking place just didn't work very well! The last 9 hours I only took one class per session as by then I also had my baby DD and a job plus DH was overseas.
You can do it and do it well!