Yes, Kelly, WTG on the WOTA abbreviation!
I've used knitpick's WOTA, Merino, and Andean Silk. The Merino knits up at 5.5 sts/inch, the others are slightly bulkier knitting up at a 4.5-5 sts/inch. The Merino's plenty soft. I agree, WOTA's not quite baby-worthy. Andean Silk is a DREAM. Not sure what gauge the pattern calls for. If 5 sts/inch, then you can use any of those yarns.
Hope that helps.