I also paddle mostly solo due to my schedule and time off requirements.
I find paddling solo leaves me to my own time and schedule. I do have a good friend that I paddle with but its rare that the two of us can get the same amount of time off to do extended wilderness travel.
I completed the Wilderness Water way last year solo and had a blast. No problems and had good weather.
My advice to people that want to solo long distances....
Have a VERY good roll and be able to self rescue. Being confident paddling a loaded boat in the conditions you're likely to face is also very important.
ACA Level 4 Kayak Instructor
Wilderness Systems Tempest 170