Floating solo doesn't seem like a bad idea..providing:

You KNOW the drift your going on - and for the water conditions of the day. High - low, etc.

You file a "float plan" with a friend or family member, one who knows what time your expected back, including your put-in and take-out.

You wear or have immediate access to a PFD.

If cell service is available on the drift, carry a cell-phone and check-in with someone who knows where you are. On the Skagit, there is coverage from Fabers Landing west (if you have Verizon).

If the area is remote, be sure to carry a small emergency pack including waterproof matches (Bic), food and dry clothes incase you and your craft get swamped and you make it to shore.

Have fun!

I plan to float the Skagit solo a number of times this coming fall/winter. Not always because I "need" to, but some weekdays I can escape the office and go others may not always be available on short notice.

Mike