Fishing for Specs and Lake Trout is good that time of year, I think it gets a bit better later in May but still really good. Little Cleo's/EGB spoons for casting and Original Rapala's and Williams spoons for trolling, I like blue and silver personally. Mepps or any spinner really work well in the rivers for Spec's. I've been using the Work Gloves that are insulated and dipped in rubber, you can get them at home depot or Canadian Tire. I don't think they are neoprene but something like it only cheaper, good for working around the site as well. Warm wool hiking socks and hiking boots are what I wear but depends what you like, some people wear rubber boots depends on how much hiking your doing, just try and get something at least water resistant. I normally bring a pair shoes to wear aroud the site.

I'm planning (hoping?) to start our trip May 1st this year - the earliest we've ever gone by at least a week. 

I have four pairs of gloves - leather work gloves with a pair of wool gloves overtop that will be my standard all week, then a relatively thin nylon (camo...like a liner also if the leather under the wool gets soaked), and one pair of mittens (those would be pulled out if we have to paddle headlong into a driving snowstorm for a few hours...again!).

Footwear, I am going with my neoprene insulated muck boots.  I love that I will have warm, dry feet all day (unless I go in above the knee) and I wear an extra-thick wool sock in them to give me a firmer fit.  They don't give the same support as a hiking boot, but that early season is sloppy and wet where my feet would likely be soggy in hiking boots by the end of the day.  My tripping partner is going with the hiking boot because of the stability on the trail but his muck boots are cheap with limited insulation and a lame sole.  He's most worried about the risk of colder temps.

I also bring a pair of light 'hey dude' knockoffs for wearing around the camp.  We travel a day or more to a base camp and then stay there three or four nights and do day trips to fish and explore.

As far as gear considerations vs. other spring or fall trips, the only change is we are bringing an extra tarp (two Aquaquest 10'X13' instead of one).  We usually hang our  hammocks from one tree in a 'V" so one of those will span over our hammocks to create a large, dry area for gear and clothing between and around the hammocks.  A folding saw is recommended as well - you'll likely encounter winter blowdowns on less-used trails and may need more firewood for warmth.

Rivers are more productive for trout than lakes, typically, but the sizes are often smaller.  We also pinch the barbs on all of our hooks...it makes it sooo easy to pull a hook out of your hand or ear when it doesn't have a barb.  And it's much easier on the fish we release.  My best speckled trout in AP was 23", my brother-in-law's best is 19".  It'd be great if he could top mine on this trip!  No need to fish deep at that time of year - the trout will be holding or feeding in the top 5 meters.  

Good luck and stay safe and warm with PFD's on at all times on the water...the water can be deadly.