wow, thanks for the all the helpful responses! i've done some more research (and observation) on these various pollinators and the plants that attract them and it seems like im headed on the right track with the plants I have, I probably just need to provide more of them and spread them over a greater space (although the mason bees and bumblebees also love the ground ivy, which flowers for a couple months throughout spring). I came across a lot of lists of plants that attract mason bees but most of them seemed to flower at a different time than the fruit trees here in the NE U.S. ... but seems like two I may want to add are some spring-flowering lavender and heather. any other plant suggestions from those of you in a similar climate?
here is one article that answers the specific question of early spring mason bee plants
not sure if I am ready yet to keeping honeybees per se but I love the idea of building mason bees some habitats to use. here is a good article I came across on the subject
@tel, I have made some tea with the leaves but I would need to develop more than a taste to keep it at bay, that would require a raging, uncontrollable ground ivy addiction