Has anyone else gotten sticker shock from these prices while planning your own trips?
With depressing regularity.

We own a timeshare and can usually get a nice 2 BR condo for $50-$70/night through RCI or renting points from friends; no way can we get anywhere near that for two rooms onsite!
We also don't like to eat out all the time, especially breakfast, so much prefer to have a full kitchen, meaning we'd want to be in a DVC unit. I can trade into DVC for much less than Disney charges, but it's still way more than many other options. *sigh*
Anyone considering staying offsite because of it? If so, where?
I'll second the recommendation that you ask that question on the Orlando attractions board, where there are plenty of people who've stayed both on and offsite who can offer recommendations. The general consensus there seems to be that if you only need one room, if you use the onsite transportation, if you like the dining plan, and if there's a discount, staying onsite is usually pretty comparable to offsite (although you can get much nicer units offsite for the same price if you know where to look). OTOH, if you need two rooms, offsite is usually the better deal, and by a fair margin. And of course plenty of people there prefer offsite because you can get much bigger units and/or more amenities than onsite.
Some people who were long "onsite all the way" discover that Bonnet Creek or the Swan or Dolphin give them the same "Disney bubble" feel as the onsite resorts, for a lower cost. We haven't stayed onsite or at any of those, but for me, the energy in the Swan and the Dolphin is definitely different from that at Disney. If I remember rightly, my one daughter who noticed the same thing said that the Swan and Dolphin feel "more like you have to behave" than WDW resorts.
My hubby and some of the other kids couldn't tell the difference and don't understand why the Swan and Dolphin aren't considered onsite. So I guess it depends on how sensitive you are to the vibrations or something.
I've known a lot of former "onsite all the way" people who now stay offsite a lot. Some of them still value onsite for the same reason they always did, but they also value other things they can only find offsite; some of them are now "offsite all the way", and wish they'd discovered offsite sooner. I'd say it's worth trying once if onsite prices are getting to you. It is tougher to research offsite resorts, but since you're posting on the Dis, you know how to do that I'm thinkin'.
