We have a family of 5 (kids are 12, 9 & 6 years old)and have stayed at Hojo's, Candy Cane, Tropicana, Del Sol, Ramada Maingate and Desert Inn & Suites. At Hojo's, Candy Cane, Tropicana & Ramada we brought an air mattress and the kids traded off sharing a bed or using the air mattress. The Del Sol had 2 beds and a bunk bed in the room and Desert Inn had a sofa bed.
I remember the room we had at Tropicana being the smallest and we had to rearrange a bit of furniture to fit the air mattress. Hojo's has nice, big rooms with space for a roll-away/air mattress. The Del Sol was the most "run down" room we stayed in. Candy Cane is nice and the room was big enough for us, but not as much room as Hojo's. I feel like it might be a tight fit with 3 teenagers and 2 adults in one room.
Desert Inn and Suites has a few different room options for larger groups, so you might want to check it out. They do not have free parking. We stayed there last summer and booked it again for this summer. It's not the nicest place, but it was clean and (relatively) inexpensive for a bigger room. They do offer breakfast, but it's not very good.