Hello, based on lots of time spent with people in condos and houses here is a quick list of positive/negative.
Bonnett Creek...5-10 minute drive to parking lots. 10-20 minute bus trip, but buses not always on time and may have to wait.
Windsor Hills...10-20 minutes to all parking lots depending on the park. No waiting for buses.
Bonnet Creek small crowded deck or patio. Just for four. Pool is large but will require walk and adult supervision if you feel the need need to do so.
Winsor Hills home (not condo) large deck with seating for all outside. Pool is right there...any time...kids swim in the morning adults relax with coffee. No running to the pool. If a little chilly...30 seconds to the shower, not blocks!
Bonnet Creek...2 bathrooms, maybe 3...it will be crowded.
Windsor Hills...splurge ( for less than 3 bedroom at BC, I'll bet) and get 5/6 bedroom 3/4 bath 2 living room and game room with TWO master suites so mom and dad and MIL and FIL have pvt baths off the bedroom...you will NOT be sorry for this one!!
You may be really surprised what you can get a home this big for in October. (don't rule out Emerald Island or Sunset Lakes for homes this large...they have lots of them and they are sitting pretty empty!)
Nothing makes a In-law vacation more tense than not enough room, especially bathrooms.
I vote for off-site, but that is what we always do and NOOOOO complaints.
Good Luck..kids will love whatever you choose and to be honest, MIL and FIL should be happy as long as grandkids are happy!!
Enjoy...Ted