Generating a bounding polygon from point data and surface interpolation

I have point data representing yield measurements within a field (typically 30-40k pts).

 

 

I want to create a bounding polygon to represent the field boundary and interpolate selected variables as surface/contour maps (e.g.. bushels/ac).

 

 

The steps I have tried are: 

 

 

1. Generate a bounding polygon - 

 

- Reprojected lat/long to UTM 

 

- Buffered points to 15m 

 

- applied AreaOnArea overlay 

 

- applied Dissolver 

 

 

Apparently this is not the correct workflow since the processing takes forever. 

 

 

2. Contour point attribute - 

 

I'm looking through the Knowledge Center for examples of using ContourGenerator transformer to generate 2D surface maps from point data and can only find examples showing how to generate 3D terrain/DEM data.  

 

What transformers should I be using?