>>2283418I'd take a look at small civilian or military frontloaders, mostly for the tool access if I had a nice job in the forest. I'm usually not for using milsurp as it is usually too heavy and you don't need the durability, but the durability might actually be handy for your forestwork and the tools and you will probably not walk that much so that the weight will be an issue. Most civilian frontloaders I know are for hiking or climbing and they will ofc also look like a recreational backpack so it would be up to you what style you like.
This eberlestock switchblade has front access so you can rip it open and access your food and tools right away without fishing for them in the pack, you can put drinks in the side pockets for fast access and you can put bungee cord through the molle at the front, you can then put your jacket through the bungee cord to let it dry externally. Tasmanian tiger TT TAC MODULAR SW PACK 25 works in a similar way and I'm sure there are even cheaper ones with similar funcionality. Just to give you and idea