Tougher tires?

I'm about to do the route down the west coast on highway 1. I'm starting with 4 days through the woods around Rainier from Seattle to Portland. I'd like to swap out my tires for something a bit more flat resistant.

I don't think I want to switch to tubless. Nothing new on race day as they say. But maybe I could be convinced if you can assure me that fixing flats in the field ain't so bad.

I run some relatively thin, low tread tires day to day. They work great for city riding and get good grip in the Seattle wet. I do get a lot of flats tho. I'm fast at changing them but bringing a bunch of tubes is heavy and my patch skills aren't great. I'm going to bring the patch kit tho, don't worry.

I'm looking for recommendations on a tougher tire. Something that will do well on gravel roads as well as highway riding. I run two different tires now so I'm open to whatever. 32 up front with minimal tread, 42 in the back with a bit more tread but still pretty low profile. Probably not going bigger than the 42. Might take the fenders off, tbd. See pics for details.

Tl;dr, best tire recommends for long distance mixed surfaces?