You could take yer wife in that topbox hehehehe. Hiya and welcome. The XTX is a great bike and will handle your kind of journeys with no problem. I would be inclined to fit some panniers cos it takes the weight lower on the bike. I did some great trips with my XTX and I had a pair of aluminium Givi Trekkers on mine and yes a top bax but only for the waterproofs. Have fun!!!

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(Now sold on, sob) 2011 Blue XT660X with gold wheels, was 26,500 km.
Engine mods: K&N Stage 1 filter, DNA Stage 2 filter, snorkel removed, Kev fuel mod fitted.
Plus: smoked Puig screen, Yam aluminium sump guard, Yamaha / Acerbis handguards, Givi Trekker aluminium side cases, Leo Vince X3 cans plus Kev front fork mod and Fender Xtender. Just fitted Michelin Road Pilot 3 tyres.

SOLD the XTX for a Super Ten 1200. And just bought a Raptor 700 so staying on here for some tips....