Under Belinfante's direction, the orchestra grew into a "B"-class musical institution taking into account its budget, programming and geographical penetration in the ensuing years. Its activities usually included a 4- to 6-program season in all major concert venues throughout the region, as well as youth concerts, cultural development programs and chamber music recitals in the community with principals of the orchestra and Belinfante assisting in several capacities. Soloists who were engaged to appear with the orchestra during the inaugural period included Lili Kraus, Leonard Pennario, Marni Nixon, Dorothy Warenskjold, and Mischa Elman. Belinfante appeared as soloist with the orchestra in the 1958-59 season, performing the Haydn Cello Concerto in C-major, Hob. VIIb/1. Throughout this period, she also appeared in numerous recitals locally and as guest conductor in engagements with European orchestras.