I usually cruise with hubby, but started doing some solo in the last couple years. First time I worried how I would handle it... turns out, absolutely loved it. If you feel like being social, its very easy to strike up a conversation with those around you. Made some acquaintances and planned a couple dinners together as well. Also easy to have some peaceful quiet time if that's what you want. It's nice not to have to negotiate any detail, just do what you feel like doing at the time.
Have an awesome time.