I went solo the season before last. I had planned on going with my brother, but he ended up unable to go. I thought about just not going, but my wife said "if you can't go by yourself, how are you going to take your boys." That of course is a very good point and anytime your wife tells you to "man up" you pretty much have to do it.
The first trip was tough. The days were ok, but the nights were long. Though the first night in, I heard my first ever bugle as I was setting up my tent. That was really cool and is something I won't forget. I made it three nights, I didn't come out with an elk, but I did come out with confidence that I can pack in solo if I need to (which may happen this year).
I have been hunting by myself for awhile now. I grew up hunting with some of my best friends in the world... I still cherish those memories with them.. But, things change and I am the only one of the gang that still hunts. I have never minded being by myself though to be honest. Sure there are things I miss about being with friends, but anymore, I like the solitude. I like being on my schedule and hunting the way that I want to hunt. I have tried hunting with a few new hunting friends, but it hasn't worked out.
Hunt hard, and trust your instincts
I don't know about everyone else, but I think one of the biggest downsides to hunting and also fishing by yourself is that it just isn't as fun when you have a great experience and don't have anyone else to share it with. I've had days where I've gone fishing with my brother-in-laws for an entire day, never had one bite and yet we all had a blast. Then I've had other days when I've caught a bunch of fish or had an awesome hunt by myself, but it just wasn't quite as fun. So for me, that is a big negative for going by yourself....