Why do people have such large trailers?

We loved our small 24ft aerolite. However, with 2 100+ lb. dogs, and the fact that one or both of us end up working (we both have separate businesses, so vacation for us sometimes is simply a change of place). Not to mention the occasional grown kid or grandchild. The small camper just got too small on some trips. The new 31 ft. has made a huge difference. So far I have been able to fit in all our favorite sites. We just returned from Elkmont and were on a site that was listed as 27 ft. trailer max. (Camper and truck all on pad, just needed to overhang a bit and angle truck for parking). More so than fitting in some spots, we are considering bringing our tent gear on a few choice trips to get to places no campers are allowed. We've even considered one of the small quicksilver pop-ups or other very small/light camper to tow behind our wrangler. I guess I'm in both camps but doubt I would give up the larger camper. I may however have a 2nd smaller pop-up or trailer tent at some point. We do see a class A down the road so who knows what size we'll end up. All about comfort and type of camping (or RV'ing as some say) that you do.