We have 5 boys, so we're a family of 7. We also homeschool and travel during the off-season. I love the low prices and smaller crowds. I also like having an excuse to keep on doing school in the summer when it's too hot to have any fun.
We generally stay off-site. We like having a big pool home. We stay in Windsor Hills, and we get a 5 bedroom home. 4 bedrooms are generally the same price, so why not get 5? We'll be staying in Windsor Hills this fall for 7 nights, and the 5 bedroom house cost us about $1400 including tax and pool heat. The low price, plus the extra space, plus the full kitchen (important when you have food allergies like we do), plus the full-size washer and dryer, plus the game room for the big ones to play in during nap time, plus our own private pool makes it too good of a deal to pass up.
That said, we're also staying on-site for a few days this time. My husband has to go to a convention at the Swan, so we're going to move on-site after our week at Windsor Hills into a suite at AoA. We can just barely squeeze in since the baby is under 3 right now. My kids have really wanted to stay in one of those rooms since they found out about the resort when it was being built, so we decided it's a good time.The kids and I will take Disney transportation, and my husband will be able to use our car. We couldn't get 2 rooms at any of the Boardwalk resorts since we found out about the convention after they were all booked, so it's the only good way for him to be able to get around like he needs to.
Until recently, my husband worked from home and could work from anywhere with an Internet connection. Our last two trips involved us renting a house for 4 or 5 weeks. He took some vacation days and joined us in the parks in the evenings and on weekends, but a lot of the days I took them myself. We had a blast. We all got APs and spent over 20 days in the parks on each of the trips. We couldn't ride anything with a height restriction when my husband wasn't with us, since my older ones weren't old enough to ride without an adult (in my opinion--not Disney's), so we stuck to the rides without height restrictions and fun activities like Kidcot stations and Agent P adventures.
We drive to WDW, and one of the reasons is that I need my big van. Technically, our family would fit in a minivan or large SUV, but we can't get all of our luggage into one. Also, because of the food allergies, we take a lot of strange items with us, like a crock pot and bread machine. (No, we won't use those when we're on-site. We'll eat in restaurants.)
I love dressing the kids in the same color. It makes it so easy to find them in the crowd. Head counts are super-quick. We haven't ever lost any of them yet, but I'm sure it would help having them all in the same color if we did. We also find that people are more likely to talk to us when they're all in the same color, and we love having conversations with people about our big family.