The Labradors and us people all love sugar snap peas. Thankfully they are pretty easy to grow. Someone has trained the pups to eat them right off the vine.
My method of planting peas is simple:
As soon as I can get a trowel in the raised bed, I plant peas. They will grow. They love cool weather.
I also throw in some legume inoculant. Some people suggest wetting the seeds and dusting them with the inoculant, but I think spreading a bit on top of the seeds in their hole is just fine.
In the picture below I am planting them where our tomatoes will be, they'll both use the same trellis-cage. Peas grow, produce pods, and then burn out pretty quickly, so they will be done before the tomatoes need the wire cage.
That's about it for peas, growing them does not require any rocket science. You can plant them as soon as you can dig the soil. An advantage of using raised beds is the raised beds warm up quicker than the surrounding ground. So go plant peas.