I think a lot of useful advice has already been given. For what it's worth, only you can decide what is likely to work for you as only you can assess the situation and don't go with anything you're uncomfortable with.
We had an opportunity to come to the World early next year, on a discount as part of a larger family on my wife's side (This would be their first trip to WDW and are looking to us for pointers and tips), some of whom I don't particularly get on with (especially their rude and brat-ish kids). It would have been a cheap vacation, I wouldn't have to drive etc etc, but I refused to have anything to do with it.
Why? Because when I go away, I want it on my terms (which is usually the same as my wife's). I want to go to have a good time and not have my time and money crimped by the needs of others and having to watch and cater for other people. I know I would hate that and we wouldn't get to see a fraction of what we would normally do because of whiney kids, miserable parents, constant complaining about everything, never wanted to get up early/stay late and doing nothing to really have a good time...apart from moaning about it all. So I said "No!".
Instead, we are coming to the world in just over a year's time, in our own company, planning what we want to do and when. Yes its costing us more and we have to wait longer before we go, but so what? I would rather pay more and do what we want than try to cheap it out and have a really bad time with bad people.
Of course, this is my situation and only my opinion. I don't mean to come off selfish, but I work hard to enable us have a vacation, we have a means by which we know what we want and what to do and I am not going to allow others to totally destroy it, knowing them for what they are. There again, if someone else wants to pay for me to go with them....