Delaware Camping State Parks

Killens Pond State Park in Delaware …?
Has anyone rented a cabin here? Come next week for only 2 days (usually the rental of an entire week but was lucky). We are not campers, this is the closest camping. Any tips or advice, experiences to tell? We are looking forward to our trip. We have 2 children ages 4 and 6, on the road. Should bring a bike or a waste? We have friends going at the same time, will be in a "primitive" camp. Thank you!
I took my cub scout den camping there. I do not remember the paths that are developed enough for bicycles. Not many anyway. Most are walking trails. If you have not made a reservation yet, you can do this online at http://www.destateparks.com/Activities/camping/reservations.htm there are 877 numbers. Who could best answer the question about the bikes. Moreover, as noted above, the website is http://www.destateparks.com/kpsp/kpsp.htm Killens Pond Information on the park is here – http://www.destateparks.com/kpsp/watrpark.htm
Cape Henlopen State Park Delaware