Well, at home you need to confine her to an expen until she learns to potty there. Do you have an ex pen? They are great for travel too b/c they fold up flat. Keep her in there on a tile floor or something protecting the carpet. (use it at your mom's house too)
when she isn't in there don't let her run free. keep her on a leash, by your side.
this is the garment she can wear to be sure there aren't any accidents.
http://www.petco.com/Shop/ProductLis...2+129+30+10270
Maybe this trip will help with the potty training.
Good luck!