I've been to Disneyworld in Florida many times, but never Disneyland. Some general tips for Disney visits:
Think small and light. That bag of lenses may not seem heavy at the start of your day, but days in the parks are always tiring, and you'll regret the extra weight by evening. The parks are often crowded, so a zoom is best for framing shots in crowds. With kids, I'd take only the 24-105. I've rarely used long zooms in the parks, and the short end of the 24-105 should be wide enough to capture a sense of the space around you. Also, fussing with your gear will leave your kids frustrated. They'll be excited to try every ride there, and won't want to wait for you to change lenses every few minutes. If this is your first visit, it should be about seeing that the kids have a great time.
Plan for rain and/or water - either a small bag with a rain cover, or at least a plastic bag to keep the body and lens dry during water rides or downpours.
I've had no choice but to take gear on the rides. Now and then my wife will elect to stay behind and hold it while my son and I ride, but if you have no other adult with you, you'll have to risk g-forces and bumps on some of the attractions. I've taken my 5DII on Space Mountain many times, in a shoulder bag cautiously cradled in my lap (with the strap around my neck). No issues yet, but I still worry about the jolts and g-forces it takes - another good reason not to take too much or too fragile gear to Disney, if you want to do the rides.
Do some homework before you leave. Know the layout of the park ahead of time and where some of the attractions are located. The parks can be disorienting once inside, and I've seen too many families waste valuable time going in circles all day as the kids tire and fatigue sets in. My son is grown now, but I have so many fond memories of Disney, and still love going myself to get the photos I never had time to take when it was a family event. Safe travels, and gave a great time!