That looks like a really serviceable trailer. Congrats! I'm sure you'll like it. The LaFree is a great "work n' play" bike and will not only do an excellent job pulling, but will look terrific with your new trailer.
This is my setup with my LaFree:
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The trailer is a thrift store find for $5 - a former $$$ kiddie trailer (that came with a bit of road rash scrapes) that I stripped down to accommodate carrying litter clean up bags. Love how easily it tracks as long as the tires are fully inflated (hint hint). It does get heavy when the bags are full, so expect to run a higher level assist than normal. If you need to turn the bike in a tight circle, just getting off and lifting the bike to turn it around will make that trailer spin on a dime.
Buy yourself a cute little hi-vis flag as they come in handy for people seeing both you and the trailer. I had to jury-rig a spot on the back for a bike light blinkie, but I wanted that visibility as well from traffic coming up up behind me.
PS - always make sure you park on level ground to prevent the bike from tipping over. (It can, and it will! Trust me!!)