Baby shower

Er

So my sister is technically the host of my shower but her family lives on one income and they don’t have a lot of spare funds. I decided to try to not let her pay for much but asked her to do most of the leg work and the actual hosting the day of the shower. My husband and I are paying for the hall rental (we have a pretty large guest list and can’t do it at anyone’s home), the decorations, the invitations, the mimosa bar and I will be making some food, the favors and putting together at least one door prize basket. I have 2 sisters-in-law, an aunt, cousin, and mother-in-law, as well as my sister who all plan on helping by making food and door prize baskets as well. I’ve asked her to do a display shower since the guest list is large and no one wants to be there for 5 hours watching me open gifts even if there is champagne. Lol. Here’s my question though... how do I make my sister feel more involved and like she’s the actual host without putting any financial responsibility on her? She did help me narrow down the menu and pick the non annoying games but I feel like I may be taking away too much from her in order to keep her from paying for things. I want her to feel like she made the day a great day for me and the guests! Also, I need ideas for a thank you gift for her!