Looplou, think in terms of only summer and winter squash..it makes things easier. Then put your courgettes into the summer and your pumpkins in with the winter squash along with the Butternuts etc.
Winter squash will store more several months if picked mature and cured well. They can also be used early as summer squash.They are dry fleshed and sweet,
Summer squash don't store, they have about the same shelf life as cucumbers.
Most summer squash are softer, more watery and less sweet than winter squash. completely different to winters
The crooknecks and straight neck squash are better than most courgettes , the crookneck is a but differnt still as it has a wee but more dense flesh than a courgette ot strightneck. I think it is the best of the summer squashes.
Try your courgettes, dipped in seasoned egg, then seasoned flour with alittle bit of parmesan cheese. added.similar to my quickie version of Fried Green toms
Does this help.
XX Jeannin e