[WDWaddict]

We went to Disneyland/DCA the third week in June and thought it was do able..it was crowded though. We never did get on Tower of Terror b/c the fast passes were either not on or one of the elevators was broken, causing a major back up. We asked those coming out and the wait ranged from 1:50 min to 2:10min wait.
We used Fast pass every chance we got and took a midday break for 2 or so hours back at the hotel. It was hot but no where near what it is like in FL in June.

I will say I think DL/DCA is more like a 4 or 5 day trip. We only took a break for dinner and 2 hours in the heat of the day(noon-2pm) and still had to commando the last day to fit it all in. At either park, you are going to have large crowds in June though.

Personally I'd go to WDW. I have been to both numerous times and while we all like DL, after this last trip we have decided we really prefer WDW. There is just SO much to do and see and lots of great places to eat at WDW. You have so many more hotel choices on property at WDW too. (that don't cost $200-335 a night) We stayed at the HOJO in DL and it just wasn't the same..we all really missed the Disney Magic we get by staying on site at WDW.