We like Knotts Berry Farm hotel. that is where we stay when we visit the Disneyland resort area. it was fun to be basically right in the park, you can hear the people on the roller coasters from your room. Snoopy does character greeting in the hotel too.
Knotts has a snoopy/peanuts theamed kids area that is really cute. the kids will like that. they have alot of roller coasters, but some are more family oriented, so your 7.5 yr old might want to ride it with a parent, the pony express is one of the tamer coasters.
the also have family rides a log ride, a stagecoach, a train.
its a really neat looking park because there are roller coasters everywhere around you.
have fun
Check online for Deals on tickets, its usually cheaper to purchase online in advance. but if you are staying onsite, call and ask if they give you a discount/deal.