Based on my limited experience with KOA's there seem to be a reasonable amount of space between sites. I only stayed at the KOA in Pomona (twice) but it was extra cozy. I don't have any slide-outs but the new guy next to me had to move my picnic table within a foot of my trailer due to his slide-out.
BTW - I would had taken that endcap site too if I were able to attend the rally.
Great choice for "Living within my means" and camping for one...
2011 Salem Cruise Lite 20RBXL & 2011 Toyota Tundra Dbl Cab
Camping History: 45 Trips / 133 Nights / 3736 Miles
FRF Social Group: Campers of the West