I am finally learning how to knit socks thanks to a class I found!

My first pair (I am still on my first sock) will be Island Punch Socks, they are knit on size 8 or 9 with 2 strands of worsted weight yarn (Berroco Comfort is what I am using) and am feeling comfy with how it is going so far. I am finally understanding the construction part which without someone to teach it to me was like this for me

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So we are leaving for Holland on Monday (we will be gone until 1/3 and I am bringing my laptop!) and I am wanting to bring stuff to maybe start another pair while I am there, I have the harmony sock needle set from KnitPicks and plenty of sock yarn here too.
So what free pattern would you all recommend me to bring with me, just in case I feel adventurous?