Dh and I and I are 54 and 49 respectively. We may be the age of your parents, I don't know. But we still take his Mom and my Parents every other year..76, 75 and 80. So age is relative until you give us the age range, IMO. If they are our age, 50s-60s then the tech aspect isn't beyond their grasp and you should just be able to explain that things have changed and you have to go with a plan approach to get most things done...need to kinda know park hours, which park, which days and uses of their FPs. They will likely be into shows and less thrilling rides...the old staples in fantasy land and one or two elsewhere. As far as driving two days...well that presents a whole other set of issues that you can deal with one of two ways...pay for your own flight or ride with them.
If they are my parents age...which I doubt because the "tone" of your post, sounds on the mid 20ish side to me( although 2007 CP may make you 30ish)...but the internet makes assumptions sometimes. You have to plan according to what they can physically do...a lot. My Mom has the most physical limitations that the other two, though her pride will not let it show much. So I base my trips with them on them...period. They raised me to cherish these years with them and DH and I are a little slower paced as well. We focus on rides my Mom can do safely and eating out...which they love. It is about the time with us and getting away from the "norm" at home. Anything we do is amazing to them and they usually have a fantastic time. MIL got a little overheated once and my parents had some gastric issues but you get the drift. Dad caught a cold at the end of their last trip with us...as did I.
MIL loves to fly and we love to fly as well. However, my parents do not. They prefer driving due to expense and anxiety of TSA, etc. They just have always lived that way. So our last trip with them we drove down. I had leased a new Cadillac and they were in hog heaven. I make dam sure to treat them like a king and queen when we go. In fact if it weren't for them, I would not be the adult I am today.
I can remember being the person you are and dreading the time it took to travel with them in my 20s...kinda on the cheap side, using a paper map, taking a cooler of food and stopping at the rest area on the way to eat lunch... GEEZ folks can't we just get a burger. It is the gen gap today like it was then...but looking back it was fantastic and those memories are priceless.
It is like I tell the younger patients I treat...at 18 your parents are stupid and don't know anything, and certainly don't know you enough to be giving you their advice
at 23....eh, Mom makes a little more sense but you have to be careful with her "old school" advice and tweak it a bit. Dad is reaching retirement and is well, good ole dad and still is good to ask about money issues.
at 35...Mom is a bit of whimsy and magical and you see her as a oracle of sorts...dad is great and loves to drink a beer with you and reminisce.
at 45...Mom is a wise wise woman who knew you the best all along and just smiles when you ask her questions and is noted for her honesty, loyalty and love. Dad sleeps more in his chair when you visit but is very interested in where you are, the successes you have had and enjoys going anywhere with you to get out of the house.
Please don't loose patience in helping them plan...do it with a glad heart, knowing they won't be there all the time. My FIL had his last trip with us to WDW in 2004, with Cancer and a
scooter in tow it was all about him. It was perfect, fantastic, slow and enjoyable. We have a pic of DH and his brother, in sunglasses on either side of the scooter and as his security agents, guarding the surrounding two feet of space and protecting the ankles of others.
Relax, find the joy in planning with them and laughing to yourself when they say and think they can "do stuff" that you know isn't possible. Some of this relaxing comes with age and looking back. You won't be disappointed.
And like PP feel free to ignore my advice...most 30 year olds do...LOL!