I agree that Croom is a great place to ride.  My two daughters and I started riding this year on utility quads and have been there 4 or 5 times now.  We generally run 10 to 15 mph cruising through the woods following whichever of the MANY trails that are there.  There is every type of terrain available in Florida to ride on there and most of the trails are shaded by trees.  Surprisingly there is quite a bit of wildlife there and we have seen at least 3 or 4 deer every trip we've taken (my daughters really enjoy that).  We always load up and head away from the parking (north lot) as soon as we can and while we may hear riders near we usually only come close to a few.  I don't agree that the North is the best place as we've found many nice wooded trails through out the park.  There are some nasty mud holes and some very hilly areas.  The last time out I noticed they have groomed some of the numbered trails and sport quad riders have cut in quite a few new woods trails that are not whooped up.  I suggest at least one GPS in your group so when you find those favorite spots and trails you can log and come back to them later, plus you can ride late in the day and be assured to head straight for your parking spot when its time.  I hope Croom doesn't go to designated trails as ONF has or we'll be stuck with whooped up trails.

Have fun and enjoy the riding as often as you can.
Stan