Is EE and onsite worth $1000?
I asked myself the same question when making our plans. Yes, the EE for a busy Carsland seems like a true advantage . . .
HOWEVER!!
Spending that money on a bed, for an extra hour, would mean skipping other features for us.
We decided we wanted the other features: CCR dinner, BB lunch, MHP, PhotoPassPlus and coming home with a souvenir!

All of that would add up to a better memory, than the one hour. (For us anyway - your mileage my vary!

)
Besides, our group can do RSR Single rider.
Total immersion is great at WDW - I know we will enjoy that again. This trip we decided to take advantage of the true "walking" distance hotels on Harbor Blvd (an advantage not available at WDW.)
If $$ was not a concern, we would be onsite. Reality is - $$$ is always a concern.
