Dan---yes. It is possible because we just use the yaks to get to and from spearing spots.
I have towed spearos behind my yak several times to aid a swimmer to get out to where we were going to spear.
Many times once we are at a spot we will drop anchor and just swim around in the vacinity of the yaks while spearin. Most times once we get our gear on and jump in we almost never remove our spearin gear and paddle unless we are going to change reefs.
Once we start hunting we just lift our anchors off the bottom and swim towing our yaks behind us if we are moving up or down the reef.
I ALWAYS have a SPARE yak on the truck incase someone wants to go with us.