Upvote:1
I second Berend for the options of public transport. Very convenient, reliable and not too expensive. If you do prefer to drive yourself and prefer to be flexible, you might find using a car sharing platform easy.
In downtown Amsterdam, you'll find car2go for example. It's a bunch of cars to share which are parked throughout the city. These you can use to drive in and around Amsterdam. Bussum and Hoofddorp should work fine. Make sure you register upfront.
Please note: I've never used these myself (never had the need). I did see people using them a lot though.
Upvote:1
From your wording it would seem that you are traveling together. In this case, the abovementioned €5.30 would result in €20+ if you are with two people in one day. That still leaves you at the train station of Hoofddorp or Bussum. Walking to the right location might easily take you 30-45 minutes. Therefore, I would in fact suggest to rent a car after all. It gives you a big amount of freedom and flexibility. Parking near the Amsterdam Central Station can be as cheap as €10/day (if you reserve): https://www.interparking.nl/en/find-parking/IJDock/
Upvote:11
It would depend on where exactly you need to be in those places. But if staying in a hotel near Amsterdam Central Station is a must, it would probably make sense to use public transport. The public transport planner for The Netherlands is called 9292.
There is a direct train to Hoofddorp, it's a 22 minute ride and costs € 5.30 per person, one way. And you may need a connecting bus, or ask your relatives to pick you up. However, if you're carrying a lot of luggage, this may still be a hassle.
To Naarden-Bussum station, it's basically the same story: A 26 minute train ride (or 29 to Bussum-Zuid), with possibly a bus. The train costs € 5.10 per person, one way.
If you're feeling adventurous, and weather permitting, you could rent a bike. Hoofddorp would be a little over an hour, Bussum an hour and a half. This would cost maybe € 15–20 per day for a 7-speed bike, or € 35–40 for an electric bike.
A taxi to either of these places would probably be around € 70–90. This might be more convenient than public transport and probably slightly faster, depending on the exact address.