I always select aisle seats when I can, I do that knowing full well that I will need to get up anytime the inside passengers want out. (and I do even if they suggest they can just crawl over, and I often wait standing in the aisle during the flight for them to come back before I sit down again) If I were to select a window (or get stuck in a middle) I know that I will have to ask the aisle person to get up so I can exit. Crawling over people is just not "a thing" for me. So, go ahead and feel free to ask them to stand so you can access your seat.