USAA also has a car buying program like Costco's or Sam's club and you can usually do pretty good with a "no-haggle" price. Right now the chip shortage has brought manufacturing to a crawl, and dealers are selling new vehicles ABOVE sticker price IF you can find one. I have seen many cases personally where dealers are selling 2-3 year old models with 10-20k miles on them for more than they stickered for when new.
Also know that "sticker prices" on RVs are not federally regulated like vehicles, and because their more fiction than fact, 30% discounts are common.
In cars and trucks, normally you will pay below sticker depending on demand for a given make/model. If a new model comes out and starts selling like hotcakes, don't expect much from dealer in terms of price concessions. What you get discounts and rebates/incentive on are the older models that are near the end of their cycle and sitting around on dealer lots.