Open House all day at the offices of RVbookstore.com and RVtravel.com. Free refreshments, mingle with RV experts and authorities. Slightly damaged books and DVDs available for free and $1. Seminars run all day in two Harbor Square seminar rooms featuring experts on technical and lifestyle aspects of the recreational vehicle lifestyle. $15 for all day pass. Seminars begin at 9 a.m. Open house is free. Check in is in the rear of the building near parking lot for Edmonds Saltwalter Marsh nature area.