There is a lot of good, easy to understand information on the College Board site. You can put in the names of specific colleges and see what kind of credits they award for APs or CLEP.
If your daughter has problems with writing (is that handwriting or written expression?) AP tests would be difficult in ways that are really similar to why college classes are difficult for people with writing problems.
CLEP tests are multiple choice and available to take at any time. They will demonstrate basic competence rather than acheivement in a public. and they are a way to earn credits at schools that aren't as competitive. Good marks on APs will earn quite a few credits especially at some state universities. For more highly competitive schools they are mostly good in terms of placement - for example a student placing out of lower levels of calculus.
More highly competitive schools want to see good marks on SAT IIs especially for homeschoolers.
With all of this I'd keep in mind it will be in flux and subject to change by the time your daughter gets to college. The one thing I would keep an eye on is making sure she has some ways outside of the home to document the works she's doing - could be APs, could be community college, etc.
