yes, get reservations as soon as you can. LOTS of people attend the roundup. get there a couple days ahead so you can take in the arts and crafts fair and also take advantage of the close out sales in all the park's gift shops.
you don't have to get to the roundup overlook site until about 9 or 10am but no later than that. there is a pancake breakfast at the site.
if you are short, take a small step ladder with you to stand on so you can see over the heads of all the folks who are in front of you, ha ha. and take binoculars if you have a pair.
