Marathon Training!

Today is Day 1 of Marathon training and if all goes well I should be doing my first 26.2 mile-run on Feb 19th!  After going back and forth between two different training programs, I actually ended up settling on a third (one of Jeff Galloway's plans).  I'll be doing shorter runs on Wednesdays and Fridays, and my long runs on Sundays.  I did very little "tweaking" of the program; I only added an extra week at the beginning so that my Farm Sanctuary run (on World Run Day 11/6/11) falls on an 11-mile long run day.  So I guess I'll be doing 11 miles instead of 10 :)

Here's what the Sundays look like:

Week 1:  6 miles
Week 2:  7.5 miles
Week 3:  9 miles
Week 4:  5 miles
Week 5:  11 miles (Run for Farm Sanctuary / World Run Day)
Week 6:  5 miles
Week 7:  13 miles
Week 8:  5 miles
Week 9:  15 miles
Week 10:  4 x 1
Week 11:  17 miles
Week 12:  6 x 1
Week 13:  6 miles
Week 14: 20 miles
Week 15: 8 x 1
Week 16: 7 miles
Week 17: 23 miles
Week 18: 10 x 1
Week 19: 6 miles
Week 20:  26 miles (Eek!)
Week 21:  6 miles
Week 22:  12 x 1
Week 23:  6 miles
Week 24:  29 miles (Really?!)
Week 25:  6 miles
Week 26:  14 x 1
Week 27:  7 miles
Week 28:  Marathon!

If I follow the plan exactly, Marathon Day will be April 15, 2012. That may be cutting it kinda close to my next half-marathon which is April 29th, so there will probably be some changes.  Especially since I won't be running an actual marathon until September.  Do I really need a 29-mile training run?!  What I'll most likely do is either 1) Get rid of Weeks 24 and 25, in which case I would have a full month before the half, or 2) Stop at  Week 20, which will be 26 miles. And at this point, all I really want to know is that I CAN do it!

Any opinions?