Just back from a similar visit. We did not stay in Giverny, but drove early from Paris to Giverny to stay in Bayeux. I will say the gardens are magnificent! But, we got there about noon, and the crowds were extreme (on a Sunday). We toured the museum first, and got a combined ticket at the museum which gave us access to the fast entrance, skipping the line for the house. But once inside, the line for the house continued (a long long line), so we ended up just touring the gardens. I still cannot say enough how beautiful they are. In early June, lots of blossoms everywhere with just as many buds coming soon. My best suggestion is to do the home early. I think I saw on the website you could do a timed ticket entrance as well. Good luck and enjoy!