Buy quality individual tools as needed to work on your bike i.e. Torx bits up to & including size T55 will allow you remove wheels & calipers. Buy a decent tool roll (Kriega or Cruz are good) also.
Before departing, take the time to learn the basics on your bike inc. torque settings. I'd also carry insulating tape, stainless lock wire, small tub of grease (35m film canister is ideal), cable ties, latex gloves, selection of screwdrivers, pliers, spanners, spare levers & tubeless puncture repair kit (string type is best IMO. Bear in mind that the type, quality & quantity of tools should reflect your mechanical abilities.
Might also be worth carrying an inner tube in case the tyre is gashed by a rock, in which case you'll need levers, tyre lube & the relevant knowledge.