My wife and I chose professions and worked extremely hard to make it possible to retire young. It came with quite a bit of personal cost too, but there isn't a day that goes by that we don't feel grateful, thankful and humbled to be in this position. Socializing with folks older than us won't be an issue. My wife often laughs at me because it tends to take me three plus hours to set up camp because I stop and talk to friendly neighbors too much lol. Usually they are seasonal and either retired or with the cash flow to have a seasonal site.
With that said, we'll be happy to volunteer at the Pot Luck dinners, play a game of shuffleboard or horseshoes and yell out BINGO or congratulate others that yell it out, but it will be unlikely we'll attend more than 50% of those events. westernrvparkowner, you make a very good point. To really enjoy things all winter, we need to stay near the coast or a larger town where there will be more than enough to do for all ages.