Thanks for the ideas!
And just for the record- there's nothing about my request that indicates that I am not behaving as a self-sufficient adult. Just looking for some sweet ideas to stay connected while I'm away. I'm pretty confident in my ability to take care of myself without my dom for a few weeks. :)
Point taken. It's easy to get the wrong emphasis in a thread sometimes.
I do think however that all the normal sweet things you can do to let him know you are thinking about him are the best, from leaving notes, arranging for the delivery of things he likes, sending postcards (old-fashioned I know but still more special than a messenger or social media post) and occasionally calling.
Same rules as no D/s though. Too much and it's over-bearing and smothering. Too little and it looks like you don't care. You know him best though so can best judge what would come across as caring and/or role appropriate.
For my part (and I'm not a Dom) I don't like the fuss of presents and too much contact would make me feel "checked-up on", so a message left for me saying goodbye, a postcard and a calls at some point to let me know that you were having a great time but also thinking about me would be more than enough.
Just be motivated by what you think he would appreciate not by what you feel driven to do. Once again however I am aware that this goes for vanilla as well as D/s situations.