@Paul________C
This is what you will need to take into consideration when deciding Router vs. Access Point mode:
1. Do you have ISP provided router/gateway, or they only provide you with modem which requires third-party router?
2. From the list of features available in Router mode, will you miss any if using Deco in AP mode? I am talking not about "nice to have" but "must have" features: What’s the difference between Access Point mode and Router mode on the Deco?
3. Do you plan to hardwire Satellite Deco so that they will be using Ethernet backhaul? If yes, will the way you want to wire them work in Router mode or only in AP mode: General questions about Ethernet Backhaul feature on your Deco
If you still need recommendation, answer these questions here and I'll help you with making a decision.