If u got sm cash to spend, then just pick a 2nd hand lens to try..u can still sell them if u don like..
Never try nver know.
Things abt travelling n photography is tat, u wont have as much luxury time to change lenses especially on tour w family n not a specific photography trip.
Unlike wide angle or normal lenses, u cant really move w just a zoom lens for such trips..
So if u r bringing it, i foresee u will change as and when u need it..
My suggestion, kip close to 1 lens of all focal range(kit), its easier to move a little forward n bacwards to frame ur picture.
In de event u come across things tat is too far for ur reach, then just enjoy it

its a travelling so ur priority is to enjoy de trip..u don have to capture everything u see from wide to tele to make de trip worth!
So by opening ur bag, switching lenses den shoot, thereafter change back normal lens, u think de subject will still be there?
I always bring lotsa lens but end up its always my wide on my camera..just end up weighing myself dwn w lotsa lens