Probably depends on the work and your endurance level. I used to do 12 hour warehouse work Saturday/Sunday over summer vacation in college while I played video games and hung out with friends the rest of the week. It felt freaking amazing. Three days in a row might’ve been pushing it, especially in my later 30s.
But considering I’ve done intense development work for 12 hour sessions over 3-5 days, having had 4 days off instead of 2 would have certainly delayed or prevented my inevitable crash of burnout.
Absolutely, have that conversation at least. Just tell them how uncomfortable you feel and if you can find a compromise. My wife and I got married in a courthouse for less than $50 and we still think it’s the best decision we ever made. Maybe do a road trip tour where you see small groups of people/family and celebrate afterwards.