I just downloaded app called Multi Photos which gives you the option of emailing multi photos in one email. It was originally for iPhone but can be used on iPad. And yea it works. If you are unhappy you cannot send more than one photo. Try it.
I won't have my iPad until tomorrow, but on my iPhone I click the little curved arrow on the lower left hand corner, then I select multiple pictures (up to 5 I think) by touching each of the thumbnails and I select SHARE.
You are right. You tap arrow on upper right and that brings up 3 boxes on upper left of. Pictures. Email, copy and delete and I can't believe in had such a hard time figuring this out tap up to 5 pictures. It is great and I wasted 99 cents on an app.