Filters: B+W 092 or Hoya R72. 25A and 29 are too light, 87C or 093 is too dark. Try some 35mm first, and shoot at a slow speed, around ASA 12, and bracket from -2 to +2 (five shots). Then pick a developer and a time.
Here's the thing about current IR: like was discussed on another thread recently, the current films are not all that great compared to Kodak HIE. If you didn't like HIE, then don't bother, do something else.
Conifers (pines, spruce, whatever) will range from grey to black. Deciduous trees and grass will be either white or light grey. You never know what you will get with IR, so be prepared for disappointment and suprises.