"You will not incur a blowout. If the plug leaks, it will be a slow leak."
I dunno, but I've had a plug spit out and deflate right quick on a car tire once.
As much of a PITA as it is, breaking the bead and patching from the inside is the safer way to go.
If you feel like plugging it use the Camel brand orange sticky plugs and take it easy for awhile.
If you use mushroom plugs, they won't spit out.
There are a whole of opinions on this topic; "Do I plug?", "Do I replace the tire?", "Which plug system do I use; 'mushroom', or 'sticky worms'?"
All of them work. I have exclusively used mushroom plugs for the past four seasons. I have not had a failure or problem with them in that time. I am talking about thousands and thousands of miles ridden on plugged tires!
To me, the answer lies with what the rider is comfortable with. Last year, I put about 6,000 miles on a plugged rear Trailwing. That tire was a gift from a friend. He decided that he wanted to replace the tire, so he gave it to me. I plugged it and rode the tire another 6,000 miles. That included a trip from Maine to West Virginia and back. However, if I were riding up the James Bay Road to Radisson, Québec, I would have swapped the plugged tire for a new tire, or non-plugged tire.
I keep several used tires stored in my garage to be able to swap in and out on my bike if necessary. I ride with a 12v air compressor, tire plug kit and the tools necessary to remove a damaged tire and install one if I have to, (which I have had to do in a campground in Canada once!)