Emilie!
There's nothing more fun than sharing WDW with family!
If you're on a budget, my first thought is to recommend the family suites at the All-Star Music resort. They sleep six with a bedroom, a sleeper sofa, and a large chair and foot rest that both make out into comfortable cots (much like a rollaway). You have two bathrooms and a kitchenette. I like the set up because some folks can go to bed while others visit in the living area. The jazz suites are very popular, so don't wait too long to get everyone on board.
If your party inches up to seven and you want to be budget-minded, you'll need to go to two rooms. Of course the lowest-priced rooms are at the Value Resorts:
the All-Stars and Pop Century. When you make your reservations, ask the agent to add a note to your reservation requesting CONNECTING rooms. You're not guaranteed rooms with a connecting door, but Disney does try to accommodate guests.
As a camper, I can't help but throw in the recommendation of pitching a tent at
Ft. Wilderness! You can put up to 10 people on a campsite and October is BEAUTIFUL weather for tent camping!
Hoping your vacation is magical!
Whitney