Thank you, Riccardo. That solved the performance problem. Now the problem is that the packages don't display correctly – for example with Air Mont Laurier outfitter the first field of the grid is empty and the there is a number appended after the package name (id?).
And where should I add the html and css I need to style a package? If I add them in the View Layout's meta section, I get error messages I don't understand.