First, congratulations on the new boat.
I am no expert on solar panels but I did sleep at a holiday Inn express. And, there was a recent post discussing this very topic.
I do not believe most solar panels will generate/provide sufficient wattage for your desires/needs. I'll let the more technical guys jump in with their expertise.
Having grown up in Gulfport, I used to spend many weekends on the barrier/Chandeleur islands...great fun and memories. Sounds like for your weekend/overnight adventures, a small Honda generator may be your best option. Besides, a generator would give you other options for powering weekend/overnight items. Just beware of carbon monoxide!
Enjoy your new boat.
Triton 190FS, 200hp Optimax, HB 798C HD & War Eagle 548LDV, HiTek, 30hp Mercury, HB 998C HD
Fishing is a privilege...catching is a bonus. Enjoy each precious moment we have to experience our great outdoors!