It's mostly the mason bees and other wild bees that you'll find pollinating squash, especially if you only have a few plants.
Honeybees prefer to work on one pollen source at a time if available and if you've got clover blooming right now, that's where you'll find them mostly. They'll go for tree pollens, buckwheat, etc, whatever is abundant and in season first. When a scout finds a good source, she will come back and tell the others so they can all get after it. When my corn was in tassels, they were hitting it pretty hard for pollen. I'd find them where the leaves meet the stalks, rolling in all the pollen that collected there.
A honeybee worker will only live for about 6 weeks during the summer, because they are working so hard to get their winter stores in, they wear themselves out.