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.