I've ridden more alone than with company. I always attach a bell to my saddle, gives the wild critters out there a heads up. Also carry an emergency pack always attached to the saddle and let the hubby know where I'll be , unless the moment takes me down another trail! Cell phone, but don't always get coverage.
I love riding alone, but also enjoy being with a few good friends. Either way, keep your wits about you and have a wonderful time. Oh yes, hubby insists that I wear a helmet, and for him I do. Small thing to do to show my appreciation for all the things he does to help me with the horses.
Be the kind of woman that when your feet hit the floor each morning the devil says, "Oh crap, she's up!".