With the continuing increased incidence rate of autism spectrum disorder over the decades, there are increasing numbers of adults with autism who require varying levels of lifelong care, typically from parents. It is necessary to understand parents' lived experience of lifelong caregiving, and how their own aging process further impacts life quality. Furthermore, greater understanding of stressors, resources, appraisals, and coping among parent caregivers of children with "high functioning autism" who are transitioning into young adulthood is particularly necessary as services, needs, and experiences for both are nuanced due to functional status, deficits in the service system, and demographic disparities. Given lifespan aspects past research has not addressed, the study focused on development of a measure of parent accumulated stressors, and on interrelations of stressors, perceived social support, future time perspective, burden, satisfaction, and coping on health-related quality of life and meaning in life among 28 parents of young adults with autism. Although proposed quantitative analyses were not completed due to sample size, qualitative analyses on parent experiences and stressors revealed common themes of concern for child's future quality of life, complicated dynamics of providing help to their child overtime, and increased stress related to others' lack of understanding of their child. In total, 10 themes and multiple subthemes were identified in relation to aspects of accumulated stressors. Findings suggest parent stress with this specific population is complex, manifesting in nuanced ways at different life stages. Impacts of the COVID-19 pandemic are also explored, and implications for scientific advancement and clinical services are discussed.