Do you want wheelchair access to the beach? You can get a token for the barrier on presentation of a disability card or with a valid doctor's note. This is possible for both Sint Maartenszee and Petten. This token is available free of charge at Great Vakantiehuizen at Belkmerweg 79 B (next to the Spar).
You can borrow a beach wheelchair at many beach bars. This one has wider tires to get through the sand well. Click here for more information about the beach wheelchair.