@gottalovepluto are you a Disneyland CL pro? Cause if so I would LOVE to hear your experiences with CL stays at GC and/or DLH! We're gonna make a DL trip at some point in the next year and I've heard a lot of mixed review of CL out there.
It is a mixed bag. I'm only pro(ish)-level on Grand Californian's club level but I've picked up bits and pieces about the others from the boards.
GCH: We love CL at GCH, the CMs that serve as concierges are helpful when things go wrong, the CM servers inside the club are great. I even recognize some of the servers year to year! The food selection is practically minimal when compared to the photos I'm seeing out of WDW, but its never really felt like that to us. They are great with allergies now, have a special menu and everything (it's taken them a few years but they got there). Breakfast has the usual nespresso machine (which saves my fam $20/day in Starbucks purchases!) and the same selection of fruits (cut melons, strawberries, grapes, as well as whole bananas and apples) and pastries/muffins/toasts each morning along with a meat platter and hard boiled eggs. I'm never around for late morning-early afternoon snacks so I don't know what they serve then. Afternoon tea time has chocolate covered strawberries & freshly made scones with a sweet white cream sauce that I simply adore- oh I almost forgot the little tea sandwiches, you can see my priorities are not the healthy items

Appetizers are two hot dishes and a tray with a variety of bread slices (and crackers?) and cheese toppings to pick from. There's also a veggie platter with like carrot and cucumber sticks. There is a wine and beer list (always the same) and you ask the server for whatever you want off that. They also have a champagne/sparkling wine but they don't list it. Evening desserts are lousy, not gonna lie. But the cordials are nice for adults as is a hot chocolate in the evening for kids. They hold story time before the fireworks for young children who go to bed early (which is adorable! almost makes me wish I had a young child to share that with!) and they even have coloring pages and crayons available all day for the kids. Rooms for CL are usually located on the 5th and 6th floors of GCH. They are not exclusive to club level guests and you can be located a long ways away from the club level so ask to be close to the lounge if that matters to you. (I swear I've never seen hallways as long as GCH has.) Oh, hours are 6:30 am to 10 pm and the club does not close between offerings.
Rooms at GCH are small, similar to AKL actually. The hotel is currently undergoing a MAJOR refurbishment (the pools don't even exist right now, they've been entirely dug up, but should be back by summer!) which should be done the end of this year so any photos you see right now won't be what you'll actually encounter if you do go next year. This includes the Club Lounge which is to go under refurbishment Aug-Oct (I think) and we have no idea what that will entail except that they are temporarily relocating the club during the work. There is a balcony outside the club where you can see the monorail go by through the hotel (and bemoan that they nixed the plans of having the monorail stop in GCH!) and you can see the tips of Disneyland (Splash Mountain and Matterhorn Mountain) over the hotel from the balcony and club windows. Fireworks in the evening are only the top half of the show although they do dim the lights and play the soundtrack.
GCH CL was the first time my family ever stayed on site and we adored it, so admittedly I have an emotional attachment. We save up and keep doing it every couple years. Even when one of our trips started off horribly (and it was completely Disney's fault, we were ready to never stay in a Disney hotel again) the CL CMs stepped up and fixed it. The service we got from them when everything was going pear shaped on day 1 locked us in as customers for years (yeah, that was a day of extreme emotions going from never-Disney to always-Disney in the space of a few hours).
Access isn't as generous as WDW, you get access to the lounge as soon as you check it but it terminates as soon as you check out. They let us enter again right as we were leaving one afternoon but that's entirely up to the CM on duty at that moment.
The little bit I know of the others...
DLH: full service CL,
beautiful view of Downtown Disney and the Disneyland fireworks at night, no afternoon tea. Cheaper than GCH, some DIS members actually prefer DLH CL to GCH CL (I am not one of them but I've never tried it, I just love the location of GCH too much)
Fwiw PP: limited(ish) CL due to closing early- hours are 6:30am to 8pm, runs the breakfast and appetizers with wine and beer that the other CLs do, no windows in the club, cheapest of the club level options
They all have the usual canned sodas, none have water bottles. We've never had a problem bringing food back and I've never heard of anyone being given any hassles about doing that. (Honestly one of my biggest/only complaints is that housekeeping will leave dirty dishes in the hallway for a couple days. Seen that on multiple trips, I do not know WHAT their problem is!)
I hope you're able to make it to DLR with your family next year! There is SO much that is going to be awesome next year! We get our train back, the new feature on our Rivers of American will open, should be pretty! Fantasmic will be back/new/hopefully even more awesome! Yeah, I'm excited even though I have no plans to return in awhile

Oh, if you are able to consider multiple times of the year to visit ask for advice on which to choose in the DL forum, people are really helpful knowing when there tend to be lots of ride closures, high crowds (well, always high crowds but the crowd scale these days is closer to: busy/super busy/crazy super busy/freaking insanity), holiday knowledge, etc.