Newbie here

Just wanted to say hello and looking forward hearing the latest news, sharing of thoughts and suggestions. I own a 2008 Frontier SE 4WD and have been thinking about making some changes, but thought I'd check out this club for ideas and suggestions. I do some off-roading with my stock truck and here in Hawaii it's mainly Lava rock and pretty intense at times. Looking forward to some suggestions and recommendations.
First of all, I was thinking about maybe just going to a larger tire for the time being and wondered what was the biggest size I should try without problems. Any suggestions would be great!