I'm spending 19 & 20 May in Pamplona. Found a nice albergue (www.corazonpuro.es) half way to Roncevalles that will pick me up evening of 20th, transport to their place for dinner/bed/breakfast and transport to SJPP next morning -- all for 45 €.
We are staying overnight at Beilari in SJPP on May 23 and will begin on May 24. Staying at Orrison on May 24. We plan to take about 5 days to get to Pamplona so we can adjust to the time change. Hope we'll see you, but if you are fast we may not.