We have a thread with a lot of links that our Disneyland team talked about regarding things to do when visiting Disneyland (Day 6 adventures):
https://www.disboards.com/threads/day-six-podcasts-of-things-to-do-around-disneyland.3620288/
Regarding best time of year to go: Keep in mind the length of days. During the winter it gets dark around 5pm, so your days are much shorter to enjoy the sites. I wouldn't recommend February because if we have a rainy season it usually happens in February/March. April is a good time to go, and so is late June before it starts getting hot, and the days are longer. If you go at the end of summer remember that Haunted Mansion usually goes down by the end of the third week in August, and It's a Small World will go down in October for the holiday overlay. Christmas break is beautiful, but depending on the fast pass situation may be really busy. It's usually the busiest time, although we really don't know how it will be in 2022. Of the choices you asked, I would choose April.
For DL/DCA I would recommend a minimum 3-day stay, and if you can swing the Disneyland Hotel or Grand Californian Hotel, stay there. If not, there are a few hotels that have really nice pools, though it's pretty chilly in April, so I don't know how much pool time you'll really want (note that sometimes we get a heat wave from the Santa Ana winds that will give us a week of 90º weather - we just don't know for sure when it will hit).
For Universal Studios - I consider this a 3/4 day park, especially during the off season. However, there is a nice City Walk to enjoy after the park and you could have dinner there. I do recommend checking out the Warner Bros studio tour, where they filmed part of Jurassic Park, Gilmore Girls, Friends, etc.
Tour of LA: I've given a few tours to my DIS friends and you can visit Griffith Park Observatory, Hollywood area, Rodeo Drive - La Brea Tar Pits, Farmers Market for lunch, and Santa Monica Pier (end of Route 66) for a sunset view and snacks). One of our Day 6 adventures describes that kind of day. Note that it will be a full day, and in the afternoon it can take up to two hours to drive to the Disneyland area from Santa Monica. You would need a full day.
I also like the Huntington Library - Google it to see if your family would be interested.
There are also walking tours - cupcake tour in Hollywood, taste tour in Downtown Los Angeles, etc., that are interesting.
For the beach I'd recommend either Laguna Beach (and check out their little downtown area, Huntington Beach, New Port Beach/Peninsula with Balboa Island/Fun Zone - maybe bike ride over there).
Recommend you rethink renting a car - it's pretty essential for Southern California because everything is so widespread and you'll save money and time in the long run. But, if you insist on Uber/Lyft, my experience is that they are pretty easy to get.
A lot of people are wary of LAX. It's the only airport I use, and it's the most economical with direct flights.
Happy Planning!!!!
DD 14 (she'll be 15 by the time we actually go) wants to go to California (we've always been a WDW family). I say likely only time going to California because of many reasons. So here are my questions and tips we're looking for and your help is greatly appreciated:
What time of year is BEST to go? December (Xmas Break), February (Winter Recess) or April (Easter Break). We're limited on when we can go because DD is going into private catholic HS this year and unless there's a school 'break', unexcused absences wont be taken well.
How many days would you spend at DL/DCA? And where would you recommend staying? (Want to be close to the parks, places to eat, definitely want a 'fun' pool, and comfortable amenities/spacious room.) On the WDW side we've always stayed at the Polynesian, Contemporary or Beach/Yacht Club Resorts. I know its different because WDW the resorts are on property and have transportation options.
How many days would you spend at Universal? (studio tour is a must). And where would you recommend staying, if we decided to transfer from DC/DL area to US area?
Tour of LA to see and do the "touristy" things (walk of fame, griffith observatory, Rodeo Drive, etc.) - would one day or half a day suffice? Are those tours I see on TripAdvisor any good?
We would LOVE to go to a beach and checkout activity on the boardwalk too - which one would be best for this? Thinking Venice Beach or Santa Monica Pier.
We're not renting a car - just dont want to be bothered and rather just use uber/lyft (i'm aware its much more costly this way, but it is what it is). With that said, based on above - is it better to stay a few days in the DCA/DL area then transfer to a hotel in the US area? Or just stay in one hotel and take uber/lyfts whereever and whenever.
Are uber/lyfts fairly easy to get when we need them?
Which airport would be best to fly into/out of? We're coming from NJ so likely flying out of EWR (Newark) and will need non-stop.