Washi tape won't stick to kraft bag / stamping issue

[bubblemonkey]

Hello everyone,

I am a bit of a stamping and paper crafting newbie and I have a few questions.

1- I bought plain kraft gift bags to decorate for Christmas. My plan was to use washi tape and stamps. I decorated one last night to give to my step-mother-in-law today and when I picked up the bag from under the tree to give it to her, all the tape on one side of the bag had lifted and curled. How embarrassing!!  I bought Cavallini brand Christmas tape. Is this just a problem with that brand or is washi tape just not going to stick to kraft paper? Should I just glue it next time (seems messy).

2- Also, the stamping--I got pretty crappy impressions from the semi-wrinkly nature of the bags. Any tips on how to get a better impression??

Thank you!