At times, when on vacation, I meet friends while there (sometimes I know in advance I will see them and other times I just run in to people). The suggestions of plans are made. Of course, these interactions are wonderful and just what vacation should be: spontaneity and fun. The headiness of vacation time is magnified by the shared experience with friends. Nonetheless, I sometimes find that my relaxing vacation is being over planned and much of the relaxing I was planning on doesn’t happen. I return from vacation not exactly refreshed.
I don’t begrudge my friends and their interest in seeing me socially. I live for that and feel lucky. But I’d gladly swap a dinner out in, say, January or February when such invitations are so scarce then try to jam in all the various invitations in July on vacation. Any suggestions?
A change of destination might help. Reading your query, Etiquetteer couldn't help but remember how interested Newland Archer was in summering in Mount Desert Isle, while his in-laws insisted on the social pleasures of Newport*. Perhaps you need to find your Mount Desert Isle, where you're sure not to run into friends and acquaintances.
Etiquetteer finds nothing wrong in standing up for relaxation on a vacation. When plans are suggested, just stretch yourself languorously by the pool and say "Oh, I couldn't move a limb. You all go off and have a nice time, and we'll catch up tomorrow." A spontaneous suggestion can just as spontaneously be declined as accepted, but once you've announced a decision, stick to it. Or, you could suggest spontaneously that everyone simply "hang out" without careering off to a restaurant, bar, beach, mountain, sideshow, or other local attraction.
Etiquetteer feels deeply your conundrum of an Absence of Sociability during the Cruel Winter Months. Worn out by the weather, and perhaps the Heady Whirl of the Holiday Season, too many people hibernate socially when they should at least make some effort. The freedom of being on vacation releases that Hospitable Urge. But like you, Etiquetteer would prefer more balance. You may have to lead the charge by issuing some January invitations.
*From Edith Wharton's remarkable novel The Age of Innocence.