From the wording of your original question it looks like you want a loop that does not allow pets. If so, there is no guarantee. They are liable to put pets in any loop, although they ae more likely to be found in the designated pet loops. About the only thing that makes a loop "pet friendly" is the presence of poop bag locations, not that everyone uses them....but at least they are available.
Yes, we love the upgraded premium sites, except that they upgraded the prices too. The premium sites are easier to back into and you have more concrete for your patio, RV positioning, and outside storage needs. (not so good for setting up a tent or other similar needing staking) The square picnic tables are ok, but not particularly more useful for our family. They are supposed to hold 8 people rather than 6 at the older tables. The covered grills are an improvement for better controlling cooking temps.