It looks like about 40% of the US population is
fully vaccinated (136 million), and about half the population has at least one shot or more (Pfizer, Moderna, or J&J).
More info on the numbers here
Ultimately, the government supplied at lot more vaccines than anticipated, so the rate of vaccines doled out really skyrocketed at first. I suppose I can't speak for what it's like for the rest of the country, but it seems that if anyone wants a vaccine, there are plenty available. I personally don't know anyone, friends or family (not just from my home state), that have had trouble getting their first shot.
As for anti-vaxxers, there's definitely a decent chunk of those people in the country. Many people are worried about side effects. I've heard of people having vaccine symptoms worse than covid symptoms, I guess everyone reacts differently. Considering that the risk of not getting the vaccine is...well...death by Covid, then getting the shot is worth it, even if it might end ****ing you up for a day or two.
And maybe some people are like, "Oh, the spread has slowed down, so should I really bother getting the vaccine?". And then of course there are people that still don't believe in covid lol.
I mean, if someone doesn't want to get the vaccine, that's their choice. They may or may not end up with covid, but at least we know it's highly unlikely for someone vaccinated to pass covid onto someone unvaccinated. So at this point, it's important to focus on yourself, family, and friends to stay safe.