I love the bum-gun for rear-end ablutions following one of life's necessities. In fact, providing constipation is not part of the equation (rare in Thailand), then the whole experience, from beginning to end, is one of life's little pleasures. Having the squirts is never an issue.
Annual 12-day trips home to the UK leave me with apprehension re: number twos, as my hoop is now perhaps the softest it's ever been since I was a baby, but it's susceptible to soreness using only paper without the post-poop douche. Despite Mum ensuring the soft stuff is available.
Definitely a wise move installing a bum-gun if you don't already have one. But farang toilets aren't often designed to cope with excess water on the floor, should that happen.
My main tip for the bum-gun process would be to pre-prepare the tissue paper before you start, rather than afterwards when one set of fingers are wet. 3 pieces folded to make a triple-thick single, then folded in half and placed somewhere close and convenient. Used purely as a dabber for drying purposes after the event.