Solo at Disneyland is a blast! I had a wondeful time in November on my own.. there a few rides in DL and DCA that have single rider lines (no or very short wait) which makes it even better during those crowded weekend nights.
Splash - go thru exit, wave at a CM, they will direct you to walk over a little bridge and wait just a tiny bit (about two minutes
The CMs told me I could get out of log and go back over bridge if I wanted to ride again.
In DCA:
special gate at Mulholland Madness (crazy mouse type coaster) - short wait.
For Screamin ( roller coaster) ask the fastpass CM for single rider pass- they will direct you to a special gate to the left of the entrance.
For Soarin - ask if any single rider passes available from the fast pass CM.. this ride is not always the best as single rider- more chance of getting on ride with fast pass as the single rider passes get abused and run out very quickly.
Maliboomer and Grizzly River Run also have single rider when it is busy.
As for hotels, some of the walking distance hotels that are good bets (clean, nice staff, comfortable surroundings) :
Howard Johnson Plaza " HoJos" (got to Mousesavers web site for a review and special link to hotel web site for discount OR got to laughingplace.com for a wealth of information on this hotel from posters on the travel planning forum.. also special link for discount rate) -- we have stayed here twice and plan to go again when we go this May. (May rate is $75.65 thru laughing place for view room)
** I suggest you make your reservation soon! Hotel was close to 50 % full when I made our reseravation two months ago!**
10 minute walk, very nice grounds, awesome staff and comfy clean rooms all at a great rate!
Candy Cane Inn - has deluxe continental breakfast that many rave about, clean rooms, nice staff, 10 min walk, free shuttle run by the hotel, very pretty grounds.
Best Western Park Place Inn- directly at the crosswalk- closer to DL than Disneyland's own hotels. Clean- no frills. Has a pancake or continental breakfast included.
Priceline is not too bad of an idea - however they now include a really icky Radisson in the three star category- eww! In the past I have won bids for $40 for Hilton and Marriot next to convention center. Long walk but doable.