I have a family of 5, we have stayed at Hojos and Best Western Park Place Inn. Both were for different reasons. The first trip was Hojos because of reviews and cost, this was a May trip. The second was BWPPI because of location, we wanted to stay closer for a mid day nap and walking to HOJOs was a little farther than I wanted to trek on my second trip to the park when I ended up carrying my youngest on the first trip. We stayed at BWPPI in October. Both were fine and would stay there again, cost wasn't too big an issue as both times we were getting deals for going "off-season". The HOJO pool area looks like a bit more fun since we were there, and we didn't really use the pool at BWPPI.
Now on to this summer....We are doing a So-Cal drive from Oregon and hitting places on the way down. We are planning on touring DL for 3 days, which means 4 nights at a DL area hotel. With the prices much pricier in mid-summer we have decided to stay at Anaheim Plaza Hotel and Suites. I booked a few nights recently and found it to be about $150 cheaper than anything else I could find within my walking radius. They don't have breakfast which isn't too fun, but with our car from driving we can figure out other options for breakfast which are cheaper.
Finally, I think you can call most of the hotels and they will let you have a 5th in most rooms. For some reason the online booking gives you errors often and says, "two rooms needed".