Where can I recycle plastic pots and trays?
A garden center may accept those pots and trays. Check with one that is convenient to you to see if it will take them. Another idea is to offer them on a recycling network such as Freecycle or Craig's List in the free offers section. I have had good results when I have posted items on these networks. Someone is always looking for just the something you have.
Here's the link for New Jersey Freecycle groups
Here's the link for Craig's List South Jersey