I would agree with most of these comments. Personally I think BugleBush is right. I have spent a little time researching, I do hunt solo and I'm going to be doing a lot more this year. I have not found to much of anything with bear issues at night in a tent with a person being in the tent. Not that it can't happen and you certainly don't want to be stupid. As far a blood goes, if you use the gutless method that will help a lot. Look up Aron Snyder's video on the method, he does a great job.
I'm not sure on the pistol. From what I have read the pistol increases adrenaline in the bear and the spray stops the desire pretty effectively. I would like to hear what others thinks.
As far as bear fences. I have thought about solo, but in a group, not really, you can all get yourselves organized and deal with the bear before your buddy gets drug off to far. <smile>
When it comes down to it, you just have to accept the fact that they are out there and embrace it. The odds are in your favor and attacks are crazy rare considering the numbers of people that enter griz country each year. You have a much much higher chance of getting killed driving to your hunting spot. Does that stop you from going hunting! The bears should not either. Just think how famous you will be if you go that way.