LindseyK --
Welcome!
Are you a Walt Disney World vet, or are you new to Disney parks all across the board? If you are a WDW vet, there's a great thread for you (courtesy of
HydroGuy) that outlines the differences between WDW and DLR, specifically for WDW vets -- but I didn't want to link it for you until I was sure!
December is a great time to go to DLR if you like the holiday season. The whole Resort (including both parks and all 3 hotels) goes all out with themed décor, seasonal goodies and festive entertainment.
Because the holiday season is so amazing, you can imagine that it is a popular time and can get very busy at certain points. That time in early December will probably be a bit crowded, but probably not too, too bad -- mainly because it is right after the Thanksgiving break, and too early for the Christmas break. So a lot of people will still be at work and school. Still, though, it won't be slow or quiet every day -- but there may be pockets of time that are slower and quieter than others.
This is the 60th anniversary year for
Disneyland, so it is expected that there will be some new entertainment and special events throughout the year, as well as some increased crowds here and there. At this point there is no way to know how the 60th will affect the holiday season.
As for hotels -- yes, the onsite hotels are very expensive, even with discounts or special offers. I'm not sure if there will be any special offers this year (again, it may depend on the 60th and how popular it turns out to be), but there are usually discounts of some sort that come out for fall, and last until mid-December.
A lot of people choose to stay off-property, and one of the nearby, walkable, less expensive hotels. Lots of people speak favorably of the Candy Cane Inn, Best Western Park Place Inn, Desert Inn & Suites, etc. Many of these "Good Neighbor Hotels" are either within reasonable walking distance from the front entrance of Disneyland or have dedicated shuttles.
I have not stayed offsite so I will leave the Good Neighbor recommendations in someone else's good hands!
If you're interested in learning all about the Holidays at Disneyland Resort, and keeping up with any news, rumors, etc., which may affect the season -- or if you want to simply just jump in and ask us questions -- please feel free to join us in the Disneyland at Christmas/Holiday Season Superthread --
HERE. (I have to change all of the 2014 season references, though -- until we get some info about the 2015 season -- so don't be confused by that!) Skim down the posts on page 1 of that thread to get a sense of some of the things that may interest you, if you'd like, or to read articles, trip reviews and reports and see photos. You don't need to read everything, of course, but if you see anything that looks interesting to you, you can click on it and read more.