OK I'll throw this in too
a lot really com,es down to like Tracker asked, what are your expectations and types of riding and skill sets
I have done both towed sleds out and rented(more like 36+ hours for me however) and I prefer to rent
only real advantage to ME on towing sleds out is, being able to take MY personal gear out and having a vehicle as well as sleds out there
90% of everything you will want or need to do can all be done on sled, MINUS getting from air port to where your staying, so a vehicle isn't a MUST have item
and pending size of group and place your staying at, some will pick you up and take you back, from airport, but NOT all, this you have to work out in advance and get in writing too is my suggestion!
so some times you need to rent a vehicle if NOT driving out!
flying IMO just makes things faster and you don't be as sore from the LONG drive as to the much shorter flight.
as for advice on where to ride, again this is hard to say, as not sure of your type of riding, about any where outside the park can be good, farther away from main area's better the off trail gets , like most places, if your having a guide, they will take you where they feel is best and most GOOD guides will evaluate you in short order and keep you in your skill level, as they don't enjoy having to dig folks out all day long!
if your doing self guided, IMO< again pending skill set/experience level
if your mostly a trail rider, RENT a trail sled for first 1-2 days and scout the area riding what your used to
as they do ride the best and handle the best and will be fun for you all
from there you will KNOW what the area is like, what level of OFF trail you want to dabble in, and rent a sled that fits that riding best, and go play, just know your limits, don't go too far into the unknown , as it can be a HARD deal to get out of some places if your not into DEEP snow riding
more modern off trail sleds are pretty capable , but there not perfect and not everyone can ride them like they do in videos and marketing adds want you to believe!
most easier ares will have more traffic and well HELP if needed, as to more off the beaten path, which is why guides are great ideas' if you want to test yourself over just playing on less technical places.