how many hour tour are you taking?
if you are staying onsite and start early at rope drop, you will not have issues with long lines and the inability to see everything you wish too.
IOA can be accomplished if you start early and stay away from the weekends.
well, depending which weekend date would determine that..
for a first timer, usually you can count on mon-thur for lesser crowds.
better yet, tues-thur for lesser crowds.
IOA can be done from early rope drop for onsite guests to park closing.
it would be cheaper to buy the express passes for the day than the vip tour if you have a short tour time period.
i have done VIP tours for special events.
none for the regular day park hours.