As I look forward to a short family trip to Eurodisney I look back at how I used to travel... 2 cameras, one flash, 3 lenses, maybe ND filters, definitely a circular polariser and maybe a tripod. This time it's one camera with a superzoom lens and a built in flash, and a compact camera.
So what has changed - well, for one thing superzoom lenses are much better than before (my Canon EF-S 18-135 gives good images and is not too heavy). The sensors are much bigger now so you can afford to crop more than before (even though you don't really want to). But what's changed most of all is... me!
For a while I found myself taking just a compact camera because the bag was too heavy, or I was worried if I didn't take everything I might not have the right kit for the moment. On reflection that misses the point - for short trips where you are really taking snaps of the moment rather than a dedicated style of photography, what you really need is to just enjoy it. That's what you are trying to capture in your photos and you won't be doing that if you have to unload the rucksack, change the lens, add the flash. The photo may not be technically quite as good... but you won't miss it!