Hi there,
I'd say that your first solution is likely to be the best one. It's far better to have a smaller number of high quality pages than a high number of low/questionable quality pages. I'd also recommend thinking about whether it makes sense to combine the content or not when it comes to the user. If the trip reviews would all make sense on one page and add value, then it's another reason to consolidate. If they aren't really relevant to each other, you may want to be very selective with which ones you combine and possible add some new, fresh content to the pages at the same time.
Also think about keyword targeting for these pages and review how much traffic they already get and use Google Search Console to understand which keywords drive traffic. Whilst the pages may be low quality, if they drive some decent traffic, you may not want to lose that. So if the keywords that are sending traffic are the right ones for you, try to carry them over to the new, consolidated pages where you can.
Hope that helps!
Paddy