I find that Wilton ready made fondant works great,it dries quick enough but not fast enough to crack.I have trouble with gumpaste too,I live in a drier climate so that might play a part.Unfortunatly Wiltons fondant tastes horrible.I also like to use a half fondant /modeling chocolate combo,you can purchase alot of these products at Global sugar art,and they are great to deal with,hope this helps!.