As a Virginia Beach Local for over 30 years I think Virginia Beach is wonderful with alot of things to do. Since you are talking October the tourist season has died down quite a bit so alot easier to get around at the beach. The Virginia Marine Science museum is close and a nice visit as is Nauticus in Downtown Norfolk which is only 20 minutes away. We also have Busch Gardens with-in a hour which has Howl-Scream on the weekends.
You have Motor World also just up the road from the beach that had Go Karts and numerous places to play Mini-golf.
The weather is usally very comfortable during the days between 68 and 80 and at night gets down to the 50's in October.
There are quite a few Local campgrounds, from Seashore State Park to Holiday Trav'l Park (I will be staying there for a small rally the first weekend of October)also KOA Virginia Beach and North Landing Beach Campground and Resort to mention a few. If you have any particular questions about Virginia beach drop me a IM with the question and I will try and assist.