Oh, so you are coming up here to PDX for a week? Cool, shoot me a PM before you come, we can meet up. I also train at Crossfit Portland, which is a nice place.
There are some exercises that kind of transfer over to grappling. i find Turkish get ups are very similar to the standing up to base position you do from the guard. You could incorporate a drill that involves 30 sec of sprawls, that will help your takedown defense. Sandbag exercises are good, grabbing and manipulating them is kind of like moving a person.