Are you visiting WDW at all? If not, I would strongly consider dropping OKW (and we're all members here, so I understand that you *want* to use your points, but if you're not going to WDW...) and just staying onsite at Universal.
I would go a back way.
I would like to know about the drive over, parking, getting to and in the parks if possible. Is the procedure long, a distance, etc?
You get onto Uni property and follow the good signs for the Themepark/Citywalk parking. Pay for parking, follow the path! Park, note what area you're in (I take a picture), follow the good signs to get to Citywalk. There are moving walkways and escalators (elevators most likely as well, for those who can't use escalators). There are always paths if you don't want to use the moving walkways. You'll hit security (just like outside Disney parks now) and then go on through to Citywalk. From Citywalk you choose either Islands of Adventure or Universal Studios! (leftish/straight for IOA, right for US...though you CAN go towards and across the bridge to IOA then take a right and get to US that way)
It is a HIKE from that parking garage, I'm not going to sugarcoat it.
I would just stay onsite there.
I do know that sometimes if you stay on property EP is included with your hotel fair. Not always.
If you stay at Portofino Bay, Hard Rock, or Royal Pacific, unliimited EP is included, as well as Early Entrance to one or both Wizarding Worlds, every day.
If you stay at Cabana Bay or Sapphire Falls, Early Entrance to one or both Wizarding Worlds is included, every day.
All attractions were almost a walk on or 15 minutes or less, except the Harry Potter ones where the EP is not useful anyway.
EP works for Dragon Challenge and Flight of the Hippogriff.
Our standpoint is that even if standby is 15 minutes, EP will be 5. And that 10 minutes added up through the day make a good dent in our wait time and a serious upswing in our fun.
Our first trip was in early December, and when standby was 5, EP was 2 minutes. (literally remembering this for Hippogriff) This made a ton of re-rides VERY VERY FUN for my son.
DAS for WDW is now like the traditional pass Universal has had, with a return time. So if you've been to WDW with DAS it will feel familiar. I personally would rather have unlimited EP, but not everyone likes re-rides like my family does.
Plus, the resorts at Universal are sooooo much more resort-like than any WDW property we've stayed at so far. Buy something at the parks, it's not just sent to the resort; it's delivered to the room. They encourage pool hopping. (not always a bonus in December...our first trip was in 2010 when it was freezing cold for many days, but on our departure day it was in the 80s before noon and that pool looked very nice) They have sunscreen and fruit-infused water for you at the pools. etc. Staying onsite there is lovely and can be well worth the expense. And then you conserve your points for actual WDW stays.
I book directly using this link:
https://uo.loewshotels.com/en/booking/uo?hotel=UEPBH,UEHRH,UERPR
I also know my one son will most likely fight me tooth and nail to get moving in the morning. I do wish Universal was open later
Alas you have to go in the summer to get the long days. In December it is what it is.
If you are commuting in, your "fight" will be earlier and last longer. If you're onsite you will the luxury of sleeping a bit more, because you are closer (walking distance depending on stamina) and the EP will make your days, apart from a true handful of rides, MUCH nicer. IMO.