my suggestion would be this:
be at the parking garage before 8
it opens then and if you are in line early, you park earlier and get a better spot.
be at the turnstile by 8:15
guests are usually let in at 8:30 if lines are growing.
not everything will be open at 8:30 as the park officially opens at 9. you will be going on a weekday which is great but still in the middle of summer which brings crowds.
go to IOA first for the coasters.
do hulk, doom, spidey in the beginning. you could do them twice as no crowds will be in the park at that time.
then head towards the back for river adventure if you want a water ride.
go then to dueling dragons, another coaster.
IOA circles around. follow thru until you end in seuss land. its not just for kids. its a colorful area with rides from cat in the hat stories.
hit any other rides or attractions while over there.
you can email guest services and ask them to mail you park guide maps so you can look at what the parks have to offer.
that would help you decide what rides you would really be interested in. jmo
you could be done with IOA by doing the highlights of the coasters by 11.
this is when the crowds start to form.
go over to the studios side.
hit the rides in the back and then move forward if the front is crowded.
aim for mummy, MIB for starters. include T2 show, shrek and any more that you think would be fun for the group. most young adults enjoy the coasters.
there is a lot in the studio side that is appealing to all ages. ET is cute, twister is interesting for one time, horror make up show is my fave, jimmy neutron is fun......get the park maps so you can see what is there and where they are located.
my tips might not be the best for you but it has worked when i have taken my boys to universal.
we stay on site and don't have to rush as we stay for days and use the fotl lanes or single lanes.
that is one thing your group could utilize is the single rider lane. you can't do much talking on some of the rides so you wouldn't miss out if you were separated on a few of them such as MIB.
eat at off times. 11 and 4 for cs should not be crowded. if you eat when others are riding, you will avoid the lunch and dinner crowds.
i think it is tough to try to do both parks in one day but if that is all you can swing for universal, give it your best shot.
get the guide maps as they are free and plan ahead.
wednesday should be good. weekends tend to get very crowded.
more questions, just post here.