Shortbow (I draw about a 40lb bow +-, so longbow would be too much)
Spear & shield (ACOUP has a nice series about the Mediterranean Omni-Spear - there's a reason it's so prevalent) plus shortsword as backup.
Light to medium armor, in D&D terms a chain shirt.
Then supporting gear in terms of sleeping, tent, traps, firestarting, etc.
This is really what most people are probably going to pick. It's what you'd expect from a partly-trained peasant levy, which is what 3 months of practice gets you.
More mules as one won't be enough to carry everything needed to survive a month.
Vials of alchemist fire, a spear, crossbow and an ax on the donkey.
Do I get magic items?