Can the tent sites accommodate 5 kids 2 adults, 2 tents and a 10×20 ez up.

2 tents and an ez up yes

Not a problem at all, good space and not too close to other sites

Yes. We were a group of 9 adults.. only thing we didn't like is the site was very very dusty.

An 8 person site can easily accommodate all that plus a camp kitchen and a canopy. Make sure you pick a site close to water and restrooms. Don't go for #115. The no-shade sunrise to sunset is brutal.