Argh just typed a long response and lost it. We've never bothered with those bloody trolleys either! We used to take a buggy but now they're older we nip back to the tent at teatime, put on extra layers and grab blankets and fold up chairs and glow sticks and head back out. The glow sticks are to keep the kids entertained! We get to stay out way longer this way!
Yes get there early if you want to camp together - pitch in a little circle and whack your picnic table in the middle if anyone has one.
Have fun everyone!