My now two year old does really well at home as long as he has no pants/underwear but he's very unpredictable when we are out, especially in public restrooms. We use diapers or training pants when out. Last month we were at the Kennnedy Space Center and he surprised us by asking for and then actually using the restroom, twice, in a five hour period. I think the reason it worked was because the restrooms were relatively quiet (one had no one else there), so little activity/distraction. But in the bathroom that was more crowded and adjacent to the main area, he wasn't comfortable enough and went in the diaper. For just one weekend, I don't think the snap pants will cause a major setback. Just make sure you offer lots of opportunities to use the restroom (and maybe they won't be as bad as you expect). My son has been able to use some rather unappealing restrooms in rest areas and other public facilities.