LOADS of pros: Do what you want when you want - not having to compromize every single decision of what to ride, when to ride, when to arrive, when to leave, where to eat, etc...it's very liberating. You'll get to see things you never noticed before because you won't be preoccupied with your group. Getting in the single rider lines can save you OODLES of valueable time...they fill in spare spots on rides...giving you more time to do other things. People do NOT look at you funny...think of all the groups out there that split up briefly so that peeps can ride their favorite ride or watch a show the rest of the group does not want to do...as far as the 1000's of strangers are concerned...that's what you are doing, and quite honestly are too busy having their own fun than to notice they've even seen you in the first place. Eating alone is not a problem either...if you really feel wierd eating alone...opt for eating at the bar...bar-tenders will make small talk with you (and maybe even entertain you with tricks) throughout your experience. And when you're at the bar, it's hard to tell where one 'group' ends and another begins.
I can only thing of two cons: 1) my friends and family think I'm nuts every time I travel solo...but but yet none of them want to go either...they will come to accept your solo traveling the more you do it...just be braced for it on your first trip, some will even try to talk you out of it. And 2) I arrived at a parade site early at DLand (45 pre-parade time) to ensure I had a curbside view. Adults w/ chlidren would show up much later and ask if I would mind stepping back so they (and their children) could have my front row view. As bad as this sounds, I held my ground, I would tell them their children were welcome to since I could see over their heads, but that they (the parents) would have to stand behind me (where they would still have view of their children) that I had shown up 45 before time to get the spot I had not by accident. The first 4 families wouldn't take me up on this offer and I did feel the stares of them and the families around me of what a horrible person they thought I was...the 5th family took me up on my offer...two delightful girls & I had the most wonderful experience.